IBM

Mainframes, Minicomputers, Operating Systems, Personal Computers, Terminals

Mainframes

• 1401 — The IBM 1401 redefined data processing not through raw computation but through integrated throughput, particularly via the model 1403 chain printer, which printed at 600…
• 704 — The IBM 704, a mainframe computer produced by IBM, is known primarily through a single technical account detailing a large-scale sorting operation conducted using custom…
• 7090 — Transistors defined the 7090’s architecture and reputation. Unlike its vacuum-tube predecessors, the machine relied entirely on solid-state switching, a leap in reliability…
• 7094 — At Bell Laboratories, the IBM 7094 anchored critical software development workflows into the mid-1960s, particularly for the Safeguard anti-ballistic missile system.
• System/360 — The announcement of the IBM System/360 did not merely introduce a new computer. It declared a new doctrine.
• System/360 Model 20 — The IBM System/360 Model 20 was positioned not as a full peer to higher-end System/360 models, but as a practical gateway for users transitioning from older punched card…
• System/360 Model 30 — The Model 30 occupied the lowest rung of the System/360 ladder, a machine built not for raw power but for migration.
• System/360 Model 50 — Though detailed hardware specifications remain absent from surviving documentation, the Model 50 is confirmed to have served as a target platform for operating system…
• System/360 Model 91 — Among the most powerful machines in the System/360 line, the Model 91 distinguished itself through its optimized data handling with the IBM 3670 Disc Storage Subsystem,…

Minicomputers

• Series/1 — The IBM Series/1 occupied a deliberate niche: not a mainframe, not a System/3, not an AS/400, and not an 1130, but a standalone minicomputer intended for dedicated…
• System/36 — IBM positioned the System/36 as the keystone of its departmental-computing strategy, a machine engineered for reliability and ease of use in business environments where…
• System/38 — The System/38 introduced an object-based architecture that predated widespread industry adoption of object-oriented principles by nearly a decade, marking a significant…

Operating Systems

• AIX — The Advanced Interactive Executive (AIX) was IBM’s entry into the standardized UNIX marketplace, designed not as a single monolithic product but as a family of…
• MVS — The name MVS (Multiple Virtual Storage) entered common usage not as an official product designation but as a convenient shorthand for VS2 Release 2, which IBM released in 1974.
• OS/2 — OS/2 emerged from a collaboration between IBM and Microsoft, with the first three versions (1.0, 1.1, and 1.2) developed jointly.
• OS/2 Warp (1994) — IBM OS/2 Warp (1994): 32-bit OS with Workplace Shell and BonusPak internet tools, 386+/4MB minimum, positioned against Windows 95.
• TopView — TopView was not an operating system, but an operating environment layered atop DOS, requiring IBM PC, XT, AT, or Portable PC hardware and at least 256KB of RAM.

Personal Computers

• Aptiva — The Aptiva series represented IBM’s push into the home PC market, a space where the company had previously ceded ground to Compaq, Dell, and Packard Bell.
• PC 5150 — Despite its late arrival in a market already活跃 with Apple, Tandy, and Commodore machines, the 5150 carried the weight of IBM’s institutional credibility.
• PC 5150 64K — The IBM PC 5150 was not a clean-sheet design but a pragmatic repurposing of existing elements, most notably drawing from the IBM System/23 DataMaster, an obscure 1980 office…
• PC AT 5170 — The 5170 was not a clean break from the XT, but a calculated escalation. IBM retained architectural continuity with the 8088-based PC family while embedding the 16-bit Intel…
• PC Convertible — The IBM PC Convertible, designated model 5140, marked IBM’s entry into the notebook form factor after earlier luggable designs like the 5100 and 5155.
• PC XT 5160 — Unlike the base IBM PC 5150, the 5160 included a fixed disk drive as standard, with typical configurations offering either 10Mb or 20Mb of storage capacity.
• PCjr — The IBM PCjr, model number IBM 4860 PCjr, was introduced to the media in 1983 and reached the market in early 1984.
• Portable 5155 — Despite its billing as a portable machine, the 5155 weighed in as a luggable (more suitcase than laptop) with an enclosure fitted with a carrying handle and a dedicated…
• PS/2 Model 30 — Unlike the higher-numbered members of the PS/2 line, the Model 30 did not adopt the proprietary Micro Channel Architecture.
• ThinkPad 701C — The ThinkPad 701C, designated type 2630 by IBM Corporation, emerged as a member of the company’s flagship notebook line during a period when portability still demanded…

Terminals

• 3270 (1971–) — IBM 3270 (1971) — the block-mode terminal family that became a protocol, a cabling standard, and a software ecosystem. 3440-char displays, BSC/SNA, PC emulation.