IBM 2260

IBM 2260. The IBM 2260 was a pioneering computer terminal introduced by International Business Machines in 1964 as part of the IBM System/360 family. It provided a low-cost, interactive alternative to traditional punched card input, allowing users to directly communicate with a mainframe computer. This device marked a significant step towards modern time-sharing systems and interactive computing, moving beyond the batch processing paradigm that had dominated the industry.

History

The development of the IBM 2260 was driven by the need for more efficient data entry and retrieval systems to complement the revolutionary IBM System/360 architecture. Prior to its introduction, interaction with mainframe computers was primarily through punched card readers or expensive IBM 1050 terminals. Engineers at IBM laboratories, including those in Kingston, New York and Raleigh, North Carolina, worked to create a cost-effective display solution. Its announcement in 1964 coincided with a broader industry shift towards time-sharing and online transaction processing, exemplified by projects like the Dartmouth Time-Sharing System and the SABRE airline reservation system. The terminal's success helped establish the IBM 2741 and later the IBM 3270 as dominant products in the computer terminal market.

Technical specifications

The IBM 2260 utilized a cathode-ray tube display capable of showing 80 columns by 12 lines of uppercase text, or a 40-column by 12-line format, with a distinctive green phosphor screen. It communicated with the System/360 mainframe via a dedicated IBM 2848 display control unit, which could manage up to 24 individual terminals. The terminal itself was relatively slow, with a maximum transmission speed of 14.8 baud, and featured a simple, non-detachable keyboard for user input. Character generation was handled by a read-only memory containing a limited character set, and the display operated on a principle similar to a television using a raster scan. The physical design was modular, often housed in a distinctive beige enclosure that became standard for IBM office products of the era.

Models and variants

Several models of the IBM 2260 were produced to cater to different configurations and user needs. The primary distinction was between the Model 1, which displayed 80 columns, and the Model 2, which displayed 40 columns. A related product, the IBM 2265, offered a more compact, lower-cost console design intended for smaller systems. For printing hard copy, the IBM 2848 control unit could be connected to an IBM 1053 printer. Later developments included the IBM 2260 Model 3, which offered improved display capabilities. These variants were supported by different IBM System/360 models, from the smaller IBM System/360 Model 20 to the larger IBM System/360 Model 65, ensuring broad compatibility across the product line.

Software and applications

The IBM 2260 was supported by IBM Basic Programming Support and the IBM System/360 Operating System, enabling its use for a variety of business and administrative tasks. Key applications included data entry for inventory control, order processing, and customer information control system updates. It was also used in early computer-aided design systems and for programming in languages like FORTRAN and COBOL. The terminal's ability to support time-sharing allowed multiple users to run IBM APL\360 or edit files on systems like the Time Sharing Option. Its integration was crucial for the development of early database management systems and interactive financial applications within corporations and institutions like Bank of America.

Impact and legacy

The IBM 2260 had a profound impact on the evolution of interactive computing, serving as a critical bridge between batch processing and modern online transaction processing. It democratized access to mainframe computer power for clerical staff and programmers, influencing workplace automation in industries from banking to manufacturing. Its design philosophy directly informed the highly successful IBM 3270 family, which dominated office terminals for decades. The concept of a dedicated, low-cost display terminal cemented IBM's leadership in the data processing industry and accelerated the adoption of time-sharing systems at institutions like the Massachusetts Institute of Technology and Stanford University. While obsolete by the 1980s, the IBM 2260 is remembered as a foundational technology that helped shape the personal computer revolution and the future of human–computer interaction.

Category:Computer terminals Category:IBM hardware Category:1964 introductions