OS/2 is an absolutely fascinating operating system and I want you to see it. I intend to write a lot about it if I can get my act together; for now, I'd at least like to help you experience it yourself. It's a trip and a half.
When I started looking into getting it working on a virtual machine, I had a hard time finding some crucial information and files, there were steps in the install process that were not explained in the few guides I could find, it wasn't clear to me which versions could be installed, and some of the install files were in formats I couldn't read.
Now that I've figured out all those problems I've created a guide with specific instructions on how to get all major versions working on VirtualBox, complete with sound, video and network in some cases, and you'll find those guides below. I also created prebuilt virtual machines you can just download and press play on.
They should be largely applicable to real-steel machines as well, excluding hardware differences. I know for instance that Warp 4 installs just about like it does here on my Pentium 3 Dell, except it hung a few times and had to be rebooted, after which everything pretty much just worked.
At a later date I hope to update this with a list of interesting programs you can run, but OS/2 is actually intrinsically pretty neat to play around with - most versions come with a ton of utilities to poke around in, and there's tons of software out in the world if you go looking for it.
Have fun!
If you like my work, consider tossing me a few bucks. It takes a lot of effort and payment helps me stay motivated.
You can grab prebuilt images of OS/2 VMs that I created for use with
Virtualbox 6.0+ from here
.
I made "just-installed" variants, and ones with patches applied, graphics drivers installed, etc. for (at this time):
If you use one of those, almost nothing in this doc is relevant. If you'd prefer to experience the joy of installing and configuring, or are working on a real-steel machine, press on.
Each version of OS/2 is a slightly different experience and
you should try each of them if you have time.
For the record, "Warp"
means nothing. There are four major releases of OS/2, and they just added "Warp"
to versions 3-4 for extra punch.
os2museum.com covers a lot of
this stuff in better detail. I'm mostly concerned with UI, so here's the
significance of each version as I see it.
I picked the versions I thought were most interesting (the
linked ones below) to
make instructions and VMs for:
You should be aware that after Warp 4, OS/2 was sold to another company, rebadged as eComStation and continued sales for some time, was sold again, rebadged as ArcaOS and continued. I do not know much about either of these since they are still commercial software and I have not been able to obtain a copy of either.
Info you find online about either of these may apply to OS/2, but may not. For instance, the website eCSoft/2 sure looks, to me, like it's named after eComStation, but appears to generally apply to OS/2 in all forms.
Here are some assorted notes about the general experience of OS/2:
Advance Engineering Mathematics by R.K. Jain and S.R.K. Iyengar is widely considered the gold standard for undergraduate and postgraduate engineering students. This comprehensive text bridges the gap between elementary calculus and the sophisticated mathematical tools required in modern engineering practice. Why This Book is Essential
Engineering success relies on a solid mathematical foundation. This textbook is prized for its clarity and depth.
Rigorous Approach: Concepts are explained with mathematical precision.
Engineering Focus: Problems are tailored to real-world applications.
Step-by-Step Solutions: Complex proofs are broken down logically.
Wide Coverage: Includes everything from ODEs to Numerical Analysis. Core Topics Covered
The book is structured to support students across various disciplines, including Mechanical, Civil, Electrical, and Computer Science engineering. 1. Differential Equations
It covers ordinary and partial differential equations in detail. You will find extensive sections on: Power series solutions. Legendre and Bessel functions. Separation of variables for heat and wave equations. 2. Linear Algebra and Matrices
A favorite section for CS and Electrical students. It explores: Eigenvalues and Eigenvectors. Cayley-Hamilton Theorem. Linear transformations and vector spaces. 3. Transform Calculus Essential for signal processing and system control. Laplace Transforms: Solving IVPs efficiently. Fourier Series & Transforms: Analyzing periodic functions. Z-Transforms: Discrete-time signal analysis. 4. Complex Analysis
Detailed chapters on Cauchy-Riemann equations, Taylor and Laurent series, and Residue Theorem help in solving fluid flow and heat conduction problems. 5. Numerical Methods
In an era of computation, this book provides the algorithms needed for: Root-finding (Newton-Raphson). Numerical integration (Simpsons’s Rule). Finite difference methods. Why Students Search for the PDF Version
While the physical hardcover is a staple for any engineer's library, the digital PDF remains in high demand for several reasons: Portability: Study on tablets or laptops during commutes.
Searchability: Use "Ctrl+F" to find specific theorems instantly.
Accessibility: Reference complex formulas while working on coding projects. Cost: A helpful alternative for students on a tight budget. Tips for Using R.K. Jain Effectively
Solve the Examples: Don't skip the solved problems; they often appear in exams.
Use the Index: The book is massive. Use the index to find specific Laplace pairs or integrals.
Cross-Reference: Use the Numerical Methods section alongside MATLAB or Python coding.
Check Edition: Ensure you are using the latest edition (5th or newer) for updated problem sets. Finding the Best Resource
When looking for the "best" way to access this material, always prioritize official university libraries or authorized digital repositories. Many Indian Institutes of Technology (IITs) provide access to these resources through their internal networks. To help you get the most out of your studies, let me know:
Which specific chapter or topic are you currently struggling with?
Are you preparing for a university exam or a competitive test like GATE?
Do you need help finding solved practice problems for a particular section?
I can provide a summary of key formulas or a study roadmap for any specific topic you choose.
Title: A Critical Examination of "Advanced Engineering Mathematics" by R.K. Jain and S.R.K. Iyengar advance engineering mathematics rk jain pdf best
Introduction
In the realm of technical education, Engineering Mathematics serves as the bedrock upon which the principles of engineering analysis and design are built. For undergraduate students and practicing engineers, finding a comprehensive resource that balances theoretical rigor with practical application is paramount. Among the plethora of textbooks available, Advanced Engineering Mathematics by R.K. Jain and S.R.K. Iyengar stands as a definitive text, particularly within the Indian subcontinent and increasingly in global academic circles. This essay examines the pedagogical structure, content depth, and utility of the PDF version of this renowned text, analyzing why it is frequently cited as one of the best resources for engineering students.
Pedagogical Structure and Content Coverage
One of the primary reasons for the sustained popularity of Jain and Iyengar’s work is its meticulous organization. The book is designed to cater to a multi-semester curriculum, typically spanning the first two to three years of an undergraduate engineering program.
The text is generally divided into broad, logical sections: Calculus, Algebra, and Analysis. It begins with foundational topics such as infinite series and linear algebra, ensuring that students have the necessary prerequisites before moving to more complex subjects. The progression is natural; it moves from Differential Calculus to Partial Differential Equations (PDEs), and from Laplace Transforms to Fourier Series.
Unlike many competing titles, such as Erwin Kreyszig’s Advanced Engineering Mathematics, which takes a slightly more abstract and theoretical approach, Jain and Iyengar adopt a problem-solving orientation. The content is strictly aligned with the syllabi of major technical universities, making it an indispensable "course companion." The inclusion of topics like Probability, Statistics, and Fuzzy Sets in later editions further broadens its applicability to modern engineering requirements like data analysis and control systems.
The Utility of the PDF Format
The digital PDF version of this textbook has revolutionized how students interact with the material. In a fast-paced academic environment, the searchability of a PDF allows students to instantly locate specific theorems or problem types. Furthermore, the portability of the PDF format means that a voluminous text—often exceeding 1,000 pages—becomes accessible on tablets and laptops, facilitating study in libraries, classrooms, or during transit.
However, the "best" attribute of the PDF version lies in its preservation of the book's layout. Mathematical notation requires precise formatting; a poorly formatted equation is often unreadable. High-quality PDF scans or official digital versions maintain the integrity of the integral signs, summations, and matrix notations, ensuring that the visual clarity required for mathematical comprehension is not lost.
Emphasis on Problem-Solving Methodology
The distinguishing feature that elevates R.K. Jain’s text above many others is its robust exercise methodology. Engineering mathematics is rarely about memorizing proofs; it is about the application of techniques to solve physical problems. Jain and Iyengar excel in this regard by providing:
Comparative Analysis
When evaluating why this text is often considered "the best" in its category, a comparison with contemporaries is necessary. B.S. Grewal’s Higher Engineering Mathematics is the primary competitor. While Grewal’s text is famous for its vast repository of problems, critics often argue that it can be concise to a fault, sometimes lacking detailed intermediate steps in solutions. In contrast, Jain and Iyengar provide more elaborate step-by-step derivations. This "hand-holding" approach is often preferred by students who struggle with the transition from high school to university-level mathematics.
Furthermore, compared to Western texts like Kreyszig’s, Jain and Iyengar’s book is often more culturally relevant to students in Asian universities, as the examples often mirror the types of questions asked in their specific university exams. The language is kept simple and direct, avoiding the verbose prose sometimes found in theoretical texts, which enhances the clarity of the PDF version when read on screens.
Conclusion
In conclusion, Advanced Engineering Mathematics by R.K. Jain and S.R.K. Iyengar earns its reputation as a premier resource through a combination of comprehensive syllabus coverage, a student-friendly pedagogical approach, and an extensive repository of solved problems. For students seeking the PDF version, the value lies not just in the convenience of digital access, but in the ability to navigate a structured roadmap of mathematical learning. While no single text can claim absolute perfection, Jain and Iyengar’s work remains a gold standard for its target audience, effectively bridging the gap between abstract mathematics and engineering utility.
Advanced Engineering Mathematics by R.K. Jain and S.R.K. Iyengar is widely regarded as one of the most comprehensive and student-friendly textbooks for undergraduate engineering students in India and abroad. Key Features & Content
The book is structured to support both foundational learning and advanced problem-solving: Comprehensive Coverage
: Includes essential topics like functions of real and several variables, matrices, ordinary and linear differential equations, Laplace transforms, Fourier series, and vector calculus. Problem-Saturated : Contains approximately 890 solved examples 3,400 practice problems in recent editions. Pedagogical Style
: Emphasizes fundamental theoretical concepts through an intelligible and lucid presentation, ensuring students are not lost in unnecessary detail. Exam Utility
: Highly recommended for college semester exams and competitive preparations like UPSC (Engineering Services) Amazon.com.be Edition Highlights
Advanced Engineering Mathematics : Jain, R. K., Iyengar, S.R.K.
Advanced Engineering Mathematics by R.K. Jain and S.R.K. Iyengar is a widely respected textbook for its thorough coverage of mathematical fundamentals applied to engineering. It is particularly noted for its clarity and is frequently used as a primary reference at institutions like the Indian Institute of Technology (IIT) Delhi Core Content and Chapters Advance Engineering Mathematics by R
The textbook is comprehensive, containing over 600 solved examples and nearly 3,000 practice problems. Major topics include:
Functions of real and several real variables, including Taylor series and multiple integrals. Differential Equations:
Covers first-order, linear differential equations, and series solutions. Complex Analysis:
Focuses on analytic functions, complex integration, and conformal mapping. Transforms: Deep dives into Laplace Transformations , Fourier series, and Fourier transforms. Linear Algebra: Extensive sections on matrices and eigenvalue problems. Vector Calculus:
Covers differential and integral calculus applied to vectors. Study Guide & Best Practices
To master the material in R.K. Jain, students often follow these strategies:
Advanced Engineering Mathematics Jain Iyengar | PDF - Scribd
An interesting feature of Advanced Engineering Mathematics by
and S.R.K. Iyengar is its "Logical and Lucid" presentation style, specifically designed to prevent students from getting lost in unnecessary theoretical details while still maintaining mathematical rigor.
Unlike many standard textbooks that prioritize abstract theory, this book is highly regarded for its pedagogical focus on practical engineering applications. Key features that distinguish it as a top choice include:
Massive Problem Set: The book contains roughly 890 solved examples and nearly 3,500 exercise problems, providing a breadth of practice that is rare for a single volume.
Graded Difficulty: Exercises are "graded," meaning they transition from basic conceptual reinforcement to complex, real-world engineering challenges like thermal systems and electrical circuits.
Self-Learning Support: It provides answers and hints for difficult problems at the end of each chapter, making it highly effective for self-study and competitive exam preparation like GATE or IES.
Expert Foundation: The text is based on over three decades of teaching experience at IIT Delhi, ensuring the content is specifically tailored to the nuances of engineering student needs.
Modern Specializations: Newer editions include specialized topics such as Singular Value Decomposition (SVD), Cubic Splines, and the application of Z-transforms to sum series, which are essential for modern data science and advanced computational engineering.
Advanced Engineering Mathematics : Jain, R. K., Iyengar, S.R.K.
Advanced Engineering Mathematics " by R.K. Jain and S.R.K. Iyengar is widely regarded as one of the most comprehensive and theoretically grounded textbooks for engineering students. Often used as a primary resource for university coursework and competitive exams like GATE and IES, it is prized for its logical structure and focus on engineering applications. Why It Is Considered Among the "Best"
The book's reputation stems from its balance of rigorous theory and practical problem-solving:
Expert Authorship: Written by retired professors from IIT Delhi, the material reflects over three decades of teaching experience.
Vast Problem Sets: Recent editions include approximately 890-894 solved examples and over 3,400 to 3,500 practice problems.
Lucid Presentation: Unlike some overly dense texts, it is designed to be "intelligible and easy-to-understand," ensuring students don't get lost in unnecessary details.
Comprehensive Scope: It covers essential engineering topics including: Linear Algebra (Matrices and Eigenvalue Problems).
Differential Equations (First order and higher-order linear). Solved Examples: Each chapter begins with a substantial
Complex Analysis (Analytic functions, Laurent series, Residues). Transforms (Laplace, Fourier, and Z-transforms). Numerical Methods and Vector Calculus. Accessing the Book Amazon.com: NAROSA Advanced Engineering Mathematics
Advanced Engineering Mathematics " by R.K. Jain and S.R.K. Iyengar is a comprehensive textbook rather than a research paper, a "paper" related to it usually refers to a technical summary or an academic review of its core applications.
Below is a structured overview of the book's key modules, often used as a reference for creating study papers or technical reports.
Core Modules of Advanced Engineering Mathematics (Jain & Iyengar) Differential & Integral Calculus : Covers foundational theorems such as Lagrange’s Taylor’s expansion
. It extends into multiple integrals (double and triple) and their applications in calculating area and volume Matrices & Linear Algebra : Focuses on Eigenvalue problems , vector spaces, and linear transformations
. This module is critical for solving large systems of engineering equations Differential Equations : Includes techniques for Ordinary Differential Equations (ODEs) of the first and higher orders, as well as Series Solutions and special functions like Bessel functions Legendre polynomials Transform Calculus : Detailed sections on Laplace Transformations Fourier Series/Transforms
, which are essential for signal processing and heat transfer problems Complex Variables
: Explores analytic functions, integration in the complex plane, and residue theory for solving real definite integrals Numerical Methods : Modern editions include Numerical Solutions of ODEs , spline interpolation, and Gauss quadrature , which are vital for computational engineering Key Features for Academic Reference Pedagogical Depth
: The text is based on over three decades of teaching experience at Problem-Centric : It contains approximately 682 solved examples and nearly 3,000 exercises
, making it a "best" choice for self-learning and exam preparation Logical Presentation
: Known for a lucid style that avoids "unnecessary details" while grounding students in theoretical fundamentals
" by R.K. Jain and S.R.K. Iyengar remains a top choice for students, along with a breakdown of its key features to help your readers understand why it’s worth a spot on their shelf (or their hard drive).
Master Your Degree with R.K. Jain’s Advanced Engineering Mathematics
For engineering students, mathematics is more than just a subject—it’s the language used to solve real-world problems in civil, mechanical, electrical, and computer engineering. If you are looking for a comprehensive guide that simplifies complex theories while providing rigorous practice,
Advanced Engineering Mathematics by R.K. Jain and S.R.K. Iyengar is widely considered one of the best resources available. Why This Book is a Must-Have
Written by respected former professors from IIT Delhi, this textbook is built on over 30 years of teaching experience. It is known for its "student-friendly" approach, focusing on clear, lucid explanations that don't get lost in unnecessary jargon. Key Features at a Glance Advanced Engineering Mathematics - Amazon.in
Advanced Engineering Mathematics S.R.K. Iyengar is widely considered
one of the best textbooks for engineering students in India, particularly for those preparing for competitive exams like
. Based on over 30 years of teaching experience at IIT Delhi, the book is prized for its clear, lucid presentation of complex theoretical concepts and its vast collection of solved examples. Key Features & Content Key Topics in Engineering Mathematics | PDF - Scribd
Here’s a helpful, structured guide regarding the PDF of Advanced Engineering Mathematics by R.K. Jain & S.R.K. Iyengar.
In most semester exams, four units dominate 70% of the marks. Open your RK Jain PDF and focus here first:
While Kreyszig focuses on mathematical rigor, RK Jain focuses on application. You will find:
You may need to install from OS/2 floppies at some point. IBM had their own floppy image format called DSK. Some modern software will read it, some won't. Virtualbox in particular will not, so you need to convert these to IMG files to use them.
WinImage seems to open some of these but when I extract files they sometimes come out corrupted, so that's a non-starter. There might be an IBM utility to extract these under DOS, but that's going to lose the boot records I'm sure so I haven't looked for one.
IBM provides LOADDSKF, an OS/2 utility that writes a DSK to a floppy. You can use this from a working OS/2 VM to write DSKs out to mounted floppy images. There's a DOS version but I haven't experimented with it. It would be nice to use it in DOSbox but I recall trying and failing. It might also work from a DOS VM, but I just use Warp 4.5.
Here's how I do this:
Now you have a set of IMGs.
If you begin your install process with a blank hard drive, OS/2 should generally
just figure it out on its own when you choose "accept disk as is."
If the drive is anything *but* blank, weird things may start happening.
OS/2's partition manager is not a very smart cookie. If it gets confused about the hard drive's geometry it may complain about there not being enough space when there actually is, or refuse to create any partitions, among other things.To prevent all of this when building a VM, pay attention to the max disk sizes specified below.
Disks larger than 2.1GB require a boot floppy patch. I am working on developing a procedure for this since the IBM instructions seem to not quite match reality. When testing this on a real machine, so far the only technique I've found that worked (even after applying IBM's patches) was to drop to a command line, manually use OS/2's fdisk to make a 2GB partition, and then install.
OS/2 1.x will crash on any modern system unless you patch some files. The
excellent os2museum has a lot of important info about this, though I find it
kind of confusing since it covers a bunch of versions:
www.os2museum.com/wp/installing-os2-1-x-in-a-virtualbox-vm/
Here's the short of it:
To install any of these you need to extract some files from the floppy images,
patch them, and put them back in, which is somewhat documented at the os2museum
link, but is kind of unclear.
I will clarify the instructions further, but I've also just done it for you,
and you can find the prepatched images linked further down for 1.1 and 1.3.
The process I used is:
Doing this without Winimage is kind of a pain. I suppose what you could do is
extract the affected file, patch it, then put it into a CD image, load it into
an OS/2 VM, put the IMG in the drive, and copy the file from the CD to the
floppy. That ought to work.
Now we can install!
As mentioned earlier, 1.0 is a pain to get working but also pointless.
1.2 I haven't bothered with after I found out that of the two versions I can find (IBM and Microsoft separate releases), one has no VGA driver and one has no PS/2 driver.
I'm told 1.3 is basically identical to 1.2 plus some invisible enhancements, so I think you'll get everything you could want to experience out of just 1.1 and 1.3.
I don't even need to give instructions for this one. Installing is trivial once
the disks have been patched (download my prepatched versions to save a lot of
work.)
Just boot from install.img, follow the steps, and make sure you select a PS/2
mouse when it asks, or you'll have no mouse after install.
Install is now complete.
There is a CDROM version of Warp 2.1 that I wasn't able to figure out. CDs of
this era were not bootable and none of the diskette images I have will boot it.
I couldn't figure out how to create a bootable disk from the files on the CD
either.
So I installed from the diskette version, which you can get here:
winworldpc.com/product/os-2-20/21 under the name "IBM OS2 2.1
(3.5-1.44mb)"
You should now have a working OS/2 2.1 system. Follow the next couple sections
if you want to extend its functionality, and remember to make a backup if it's a
virtual machine, in case you hose the system.
For CD-ROM support I'm told you should have the "IBM IDE CD-ROM Option/Device
Driver Diskette." I can't find that, but I found another IBM driver that works,
albeit it requires overwriting the entire IDE driver in the OS. I made an image
of it here
It seems to work, and the prebuilt VM I made with "CD_MM" in the name has it
installed, as well as the multimedia extensions (though the sound doesn't seem
to work yet) but if you need to install it yourself:
You should now have a CDROM in Drives.
This install uses the diskette form of OS/2 2.1 since I couldn't figure out how
to get the CD version to boot. However, if you get the CD ISO, you can install
MMPM/2, which will give you sound and video support.
At this time I can't actually get any sound out of it (or any other version of
OS/2 except 4/4.5) but maybe your luck will be better. It's preinstalled on the
prebuilt VM I made with "CD_MM" in the name, but you can install it yourself as
follows:
That's it.
Note: Sound doesn't seem to work. I'm not sure why. It works on Warp 4/4.5
Installing Warp 3 on Virtualbox 6.0 is actually a fairly smooth process. It didn't use to be, it used to suck. Things have improved.
First you'll want Warp 3. Get it here:
archive.org/details/IBMOS2Warp3Collection IBM OS2 Warp 3 Connect - Blue - 8.200 - English - CDROM.zipConnect is a slightly updated version of Warp that has more network features, and you probably want them.
.) and press
OK; It
should find the driver
Note: The install process for Warp 4 is similar to 3 but subtly different, so pay
close attention.
Get the ISO from
winworldpc.com/product/os-2-warp-4/os-2-warp-40
IBM OS2 Warp 4.0 (ISO)
I maI may add detailed instructions for 4.5 in the future, but it's been updated to the point where it's not that hard to install.
You can get the disk here: https://winworldpc.com/product/os-2-warp-4/os-2-warp-452 IBM OS2 Warp 4.52 (4.52.14.086_W4)
The instructions are basically the same as Warp 4, except you don't need to boot from floppy; the CD is self-booting.
Also, during install you'll be asked if you want a number of packages, like Macromedia Flash and a Java development system. The Java one, for what it's worth, always hangs on install for me, and I doubt it's of much value.
Now that you're started up, you're going to want graphics drivers. Even when Warp was new people would commonly have been running monitors at higher than 640x480x8bpp, so a lot of software is going to feel more comfortable at higher resolutions./>
Since Virtualbox emulates no specific graphics card, you need a generic SVGA
driver. Fortunately this is readily available - Scitech produced a generic
driver called SNAP that works very well, it even has good 3D support.
SNAP is not hard to find, but there are two issues:
To help you, I've prepared an ISO
with the driver, the serial number (yes!
this was a commercial graphics driver! it cost money!) and the necessary patches
for each OS, which you should probably have anyway.
For Warp 3 you have to do a very irritating patching process (sorry, I couldn't
simplify it any further.) Also, if you run the "Scitech Configuration" program
afterwards, you'll hang the machine, so don't do that.
Note: You do not need to do this for Warp 4.5, it comes with
a VESA driver. Just skip straight to setting the resolution.
For Warp 4 it's pretty straightforward:
So what should you do in OS/2?
Good question. I don't actually know yet. Long story short, I've been trying to write some kind of documentary about this OS for years and failing, even though I got it working in VM and on a real machine ages ago.
What I can tell you is this: OS/2 enjoyed remarkable success as an underdog, and in its day there was plenty of software for it. There are a number of major commercial applications available for it, even some games, and bits and pieces of all sorts that you can scrounge up online. Beyond that, just dig through it, experience it. It's a weird piece of software.
The first thing you'll need to be able to do is to actually get software into the VM.
CD images are the most obvious route, since OS/2 natively understands those, any large commercial software package you find online has a good chance of being in ISO format, and you can make ISOs trivially from files on your computer with any CD burning app.
Floppy images are also an option but there are no good free manipulation programs. If you find software online that's already in IMG/IMA format that's one thing, but if you want to make your own floppy images it's tough to do except from inside a VM, which is a chicken-and-egg problem.
FTP could work to move files between a local server - there are several very simple and free FTP servers out there you can set up, and there's an FTP client built into OS/2, I think from 2.x up.
A web browser is probably the most convenient option if you can work it. Any site that's plain HTTP can be accessed with the basic browser included with several versions of OS/2, and certainly with Netscape, which you can get here and move into your VM via an ISO, as described above.
You can also run a local HTTP server, such as Miniweb - just put files to transfer in htdocs and (supposing your computer's real IP is 192.168.1.100) access them at http://192.168.1.100:8000/
Accessing HTTPS sites is a problem. Any browser released before the late 2000s - which covers everything ever officially released for OS/2 - will not access any modern website. I'm told there is a Firefox 45 build for this OS but I still don't know if that fixes the HTTPS issue.
I have limited experience with running OS/2 software at all, but here is what I've learned so far:
There are a number of substantial OS/2 hobby and resource sites where you can find software, as well as drivers etc. to make OS/2 work on real hardware.
Hobbes always deserves mention. It's kind of a bulk file repository for basically everything imaginable for OS/2, but it's just files with very little context or organization, and you won't be able to load it inside of OS/2 itself without signficant effort because as far as I can tell it's HTTPS-only.
eCSoft is another popular resource, but unlike Hobbes they don't seem to host much themselves, just link to other sites, so you may find broken links. They do however have plenty of info and screenshots on each program and
Internet Archive doesn't have a lot of easily located OS/2 software, but my recollection is that a lot of DOS/Windows software CDs from the 90s had OS/2 directories. So there's that.
OHFOWG is a compilation of OS/2 Warp games. I have not been through it at all thoroughly but you can check it out; I'll advise you that it's 1.8GB, but Warp 4.5 (at least) will read a DVD happily, so I extracted it, dumped it into a DVD ISO, and mounted it successfully.
If this was interesting to you, or if you did something interesting with it, email me:
If you like my work, consider tossing me a few bucks. It takes a lot of effort and payment helps me stay motivated.