To keep up with the personal computing market, IBM developed and introduced enhanced and faster models throughout the decade following the launch of the IBM Personal Computer. Here are some of those developments

1981

In August: the IBM Personal Computer — a different type computer with a whole new image and ready to make computing a democratic process, along with DOS 1.0, a breakthrough in operating systems.
1982
In July-September: PC enhancements — main memory and diskette capacity is doubled; DOS 1.1 is shipped.
1983
In January: the IBM PC is announced worldwide.

In March: the Personal Computer XT — nine times the memory capacity and room to grow — is announced. DOS 2.0 is announced to support XT hard file and hierarchical directories.

In August: the Entry Systems Division (ESD) is formed to be responsible for worldwide development and product management, and U.S. manufacture of IBM's general purpose, low-cost personal-use computer systems. Philip D. Estridge named president of ESD.

In October: 3270 PC, PC/XT 370 — introduces a windowing technique to retrieve information from several sources and work with it.

In November: PCjr — the first IBM computer designed and priced specifically for the home, weighing in at less than nine pounds.
1984
In February: Portable Personal Computer — a 30-pounder that can travel where the work is — and DOS 2.1.

In July: PCjr enhancements — a new keyboard and expanded memory.

In August: Personal Computer AT — a new enormously powerful, multitask, multi-user computer — and DOS 3.0 to support the AT. Also, PC Network, which makes it possible for up to 1,000 PCs to be linked in a professionally-designed and installed broadband network. DOS 3.1 will support the PC Network.
1986
In January: IBM announces that the PC/XT will be built by the company in Guadalajara, Mexico.

In April: the PC Convertible — a small, powerful, easy-to-carry personal computer system. DOS 3.2 to support the convertible's 3.5-inch drive.

In September: Personal Computer XT Model 286, along with other enhancements.
1987
In April: the IBM Personal System/2 family of products. Includes: Model 30, in two desktop configurations using Intel's 8086 processor; Model 50, a desktop workstation; Model 60, with a floor-standing processor (both Models 50 and 60 use Intel's 80286 processor); and Model 80, a powerful floor-standing system in three configurations using Intel's 80386 processor. Micro Channel architecture is introduced in high-end models. And, to tap the greater power, two new strategic operating systems: DOS 3.3 and Operating System/2. OS/2 is the first offering of IBM Systems Application Architecture (SAA), a common framework for developing and using the same application programs on all IBM systems.

In August: PS/2 Model 25, an affordable model for business and education users.

In November: OS/2 Standard edition 1.0 and OS/2 Extended Edition 1.0.
1988
In January: Screen Reader is announced, the first release of the IBM Independence Series of products designed for computer users with special needs.

In June: PS/2 family expanded to include seven new desktop machines — the PS/2 Model 70; the PS/2 Model 50Z; and the PS/2 Model 25 LS in various configurations.

Also in June: IBM announces that PS/2 manufacturing operations will move to Research Triangle Park, N.C. ESD Boca Raton laboratory becomes responsible for all U.S. hardware development for PS/2 products.

In July: a new, easier-to-use version of the Disk Operating System — DOS 4.0.

In September: the Model 30 286 — twice as fast and offering customers 25 times more memory capacity than the original Model 30.

In October: first shipment of Operating System/2 Standard Edition Version 1.1, which features an easy-to-use graphical interface called Presentation Manager.

In November: SpeechViewer, second product in the IBM Independence Series.
1989
In April: at COMDEX in Chicago, IBM demonstrates a PS/2 Model 70 A-21 using Intel's new i486 microprocessor.

In May: more PS/2 family members — the PS/2 Model 55 SX and the PS/2 Model P70 386. Both models support OS/2 and DOS Versions 3.3 and 4.0.

Also in May: new versions of OS/2 — OS/2 Standard Extended Editions Version 1.2 — which have significantly new functions, including many that reflect IBM's continued commitment to SAA.

In September: two new high-performance PS/2 Model 70s — the 386-A61 and the 386-061 and the PS/2 Model 30 286-E31, with a 30 MB fixed disk and using the Intel 80286 microprocessor.

In October: shipment of the 486/25 Power Platform a — full quarter ahead of schedule — making IBM the first company in the world to ship the industry's most powerful microcomputer processor.

In November: OS/2 LAN Server Version 1.2, which provides more capacity and function, increased file server performance and expanded communication support.

  PS/2 Wizard Adapter.

In December: Phone Communicator, a member of the Independence Series, for hearing- or speech-impaired users.

Also in December: PS/2 Model 70 486, the most powerful member of the PS/2 family.
1990
In March: several new models of the PS/2, busmaster adapters and peripherals. Includes: four new configurations of the PS/2 Model 80; two new configurations of the PS/2 Model 65 SX; the PS/2 Model 70 386-031; the PS/2 Micro Channel SCSI Adapter; the PS/2 Micro Channel SCSI Adapter with Cache; the PS/2 320 MB SCSI Fixed Disk Drive; the PS/2 60 MB or 120 MB SCSI Fixed Disk Drives and the PS/2 CD-ROM Drive.

In April: OS/2 Standard Edition 1.2 translated and made available worldwide.

In May: new, enhanced Model 25 286, available in two models, the 006 and 036.

In October: the first medialess PS/2, the Model 55 LS (LAN Station), ideally suited for use as a local area network workstation.

Also in October: two new PS/2 family members — the Model 95 XP 486 and the Model 90 XP 486 — unleash the power of the Intel i486 processor and feature a unique design that allows them to be upgraded for future technologies. Also announced: PS/2 Model 80-A16, -161, -081; PS/2 Model 65 SX-321; PS/2 486/33 Processor Complex Upgrade Option; PS/2 2.3 GB SCSI Tape Drive; PS/2 External Storage Enclosure for SCSI Devices; PS/2 XGA Display Adapter/A; PS/2 memory Module Kit; PS/2 256 KB Cache Option; PS/2 5.25-inch Slim High Diskette Drive. Also introduced: the OS/2 Standard Edition Version 1.3, a smaller, faster version of OS/2 and new releases of OS/2 Extended Edition and OS/2 LAN Server.

In November: PS/2 Model P75 486, extending the high function and performance of the Intel i486 microprocessor to portable systems, giving customers a high-end desktop computer to go.

In December: new in the Independence Series — THINKable — a multimedia software program for the PS/2 that can help therapists treat those suffering from injury or disability.
1991
In March: PS/2 L40 SX, a lightweight, durable battery-operated 386SX computer that gives customers desktop function anywhere it's needed.

In April: OS/2 2.0 — a 32-bit, advanced function operating system positioned as the platform of choice for the industry.

Also in April: the first computers with Intel's newest 486 SX microprocessors are shipped. PS/2 Model 90 XP 486 SX and Model 95 XP 486 SX offering advanced storage capabilities and enhanced graphics at an entry-level price.

In May: VoiceType, another edition to the Independence Series, makes operating a computer as easy as speaking.

In June: the midrange PS/2 product line is strengthened with announcement of Model 35 SX and LS, Model 40 SX and Model 57 SX. In addition, DOS 5.0, an improved entry-level operating system that requires less memory than earlier versions while delivering more features and functions, is introduced.

In June: PS/2 486/50 Processor Upgrade Option for Models 90 and 95 XP 486 systems — the industry's first use of the i486 50MHz technology.

In just that initial ten-year period — the first decade following the launch of the IBM PC — IBM had steadily introduced personal computers that increased processing speed tenfold over the original PC, increased the instruction execution rate (MIPS) a hundred fold, grew system memory a thousand times (from 16KB to 16MB) and beefed up system storage by a factor of 10,000, from 160 KB to 1.6 GB. And that was just the beginning of many more achievements — such as the ThinkPad — yet to come.