Medium

Tushar Biswas

Tushar Biswas

·

Aug 24

Mainframe and APIs: How 60-Year-Old Systems Learned to Speak REST

Part of the Mainframe 101 series. This is the final post — the one that ties the hardware, the operating systems, the data, and the…

Mainframe and APIs: How 60-Year-Old Systems Learned to Speak REST

Tushar Biswas

·

Aug 17

Introduction to Mainframe Transaction Processing Systems (CICS)

Part of the Mainframe 101 series, exploring the systems that quietly run the world’s most critical infrastructure.

Introduction to Mainframe Transaction Processing Systems (CICS)

Tushar Biswas

·

Jul 27

Data Access, Databases & Storage on z/OS: A Complete Guide Across All Major Vendors

Every mainframe conversation eventually comes back to the same question: where does the data actually live, and how does the system get to…

Data Access, Databases & Storage on z/OS: A Complete Guide Across All Major Vendors

Tushar Biswas

·

Jul 27

We Mapped 9 Mainframe Operating Systems Across 6 Vendors — Here’s Why “Just Use z/OS” Is the Wrong…

In Few minutes, you’ll understand why IBM’s z/OS, z/VM, z/VSE, z/TPF, and Linux on IBM Z are only part of the mainframe story — Broadcom…

We Mapped 9 Mainframe Operating Systems Across 6 Vendors — Here’s Why “Just Use z/OS” Is the Wrong…

Tushar Biswas

·

Jul 5

The Mainframe Six: A 3-Minute Guide to Who Still Builds Mainframes (and Why It Matters)

A quick-read companion to the full deep-dive series.

Tushar Biswas

·

Jun 27

Introduction to Mainframe Computing & Mainframe Hardware: A Complete Guide Across All Major Vendors

Mainframes are not a single product from a single company — they are a class of computing defined by extreme reliability, throughput, and…

Introduction to Mainframe Computing & Mainframe Hardware: A Complete Guide Across All Major Vendors

Tushar Biswas

·

Apr 23

Why IBM Z Is the Most Secure Computer You’ve Never Used

When people talk about cybersecurity, they usually think of firewalls, antivirus software, or cloud security tools. But the real foundation…

Tushar Biswas

·

Apr 23

Why the World’s Largest Airlines Still Rely on IBM Z

When people think about aviation tech, they imagine cloud-native apps, AI pricing engines, and sleek booking platforms. But behind the…

Tushar Biswas

·

Apr 21

The Immortal Engine: Why the World Still Runs on COBOL and IBM z

In the glass-walled data centers of the world’s largest banks, there is a quiet, rhythmic hum. It isn’t the sound of the latest…

Tushar Biswas

·

Apr 19

The Invisible Backbone: Why the World’s Biggest Databases Run on IBM LinuxONE

1. Vertical Scalability: The “No-Sharding” Advantage

Tushar Biswas

Tushar Biswas

Computer Science Undergraduate @SRMIST | Committee Member at @ISTE SRMIST | @IBM Z Student Ambassador | Open Source Contributor

Following

Help

Status

About

Careers

Press

Blog

Store

Privacy

Rules

Terms

Text to speech