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Reference / Glossary

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Cross References
1 [1] IBM introduced the new Series/1 computer in November 1976 for experienced data processing users, i.e., primarily for customers with programming capabilities and a need for multiple systems. It was a general purpose system that offered both communications and sensor-based capabilities, and it enabled users to attach a large number and variety of input and output units, including custom-built devices for special applications.
1 [2] The Series/1 consisted of 19-inch rack-mountable data processing units. It initially was available with two processors: a Model 3, ranging in memory size from 16K to 64K, and a Model 5, ranging from 16K to 128K.
1 [3] In addition to the processors, the Series/1 also offered at announcement a fixed disk storage unit containing 9.3 million bytes of storable space; a diskette unit able to store either up to 250,000 or up to 500,000 bytes on one- or two-sided diskettes, respectively; a matrix printer which provided 120 character per second bi-directional capability; a display station; a sensor Input/Output unit; an I/O expansion unit to attach additional devices;
1 [4] various communications features; and OEM attachment features. Various processors and peripherals of the Series/1 were withdrawn from marketing between 1983 and 1987.
145 Introduced in September 1970, the Model 145 was the first IBM computer to have a main memory made entirely on monolithic circuits on silicon chips (previous 370 models used magnetic core main memories). Its system storage ranged from 112K to 512K, twice that available with the IBM System/360 Model 40 . It operated at speeds up to five times the Model 40's.Purchase prices for the Model 145 ranged from about $705,775 to $1,783,000. The Model 145 was withdrawn in 1971.
148 The Model 148 of the System/370 computer family was rolled out in June 1976 and first shipped during the first quarter of 1977. It enabled the users of intermediate-sized computers of the day to design larger, more efficient interactive, database and data communications applications. The machine had a maximum main memory of two million characters with internal performance speeds up to 43 percent faster than the earlier Model 145. The Model 148 was withdrawn from marketing in November 1983.
1013 Announced in October 1961, the 1013 Card Transmission Terminal transmitted data from punched cards at speeds up to 300 characters per second (cps) and punched received data into cards at a rate of 160 cps. When transmitting, data in the punched cards was photosensed and entered into buffer storage. Once there and under the control of the 1013s stored program, data could be added, deleted or sequentially stored for transmission. It was withdrawn from marketing in January 1977.
1050 [1] The 1050 Data Communications System was a multipurpose, station or office-oriented data communication terminal system that was announced in March 1963 specifically for important data record keeping and transmission functions. It operated over established communication lines to provide rapid, dependable communications between remote locations and a central data processing site.
1050 [2] The 1050 system consisted of the 1051 control unit, 1052 printer-keyboard, 1053 printer, 1054 paper tape reader, 1055 paper tape punch and 1056 card reader. These various components were withdrawn from marketing between February 1974 and June 1978.
1301 [1] The 1301 Disk Storage Unit was announced in June 1961 with an ability to monitor as many as 280 million characters of information in a single system by making use of comb-like arms flying on layers of air. Compared with the innovative IBM RAMAC, the 1301 provided a thirteen fold increase in storage density and three times faster average access to information.
1301 [2] The 1301 could be linked to any of five intermediate-to-large solid-state IBM computers (1410, 7070, 7074, 7080 and 7090) or shared by any two of them. One unit could store between 50 million and 56 million characters of information, depending on the computer to which it was connected. Up to five 1301s could be used in a single system. The 1301 was withdrawn from marketing in October 1970.
1401 [1] The all-transistorized 1401 Data Processing System placed such features as high-speed card punching and reading, magnetic tape input and output, high-speed printing, stored program and arithmetic and logical ability in the hands of smaller businesses that had previously been limited to using conventional punched card equipment.
1401 [2] Announced in October 1959, the 1401 was equipped with ferrite-core memories having capacities of 1,400, 2,000 or 4,000 characters. The system could be configured to use punched-cards and magnetic tape, and could be used either as a stand-alone computer or as a peripheral system for larger computers. The 1401 processing unit could perform 193,300 additions of eight-digit numbers in one minute.
1401 [3] The monthly rental for a 1401 was $2,500 and up, depending on the configuration. By the end of 1961, the number of 1401s installed in the United States alone had reached 2,000 -- representing about one out every four electronic stored-program computers installed by all manufacturers at that time. The number of installed 1401s peaked at more than 10,000 in the mid-1960s, and the system was withdrawn from marketing in February 1971.
1402 The 1402 Card Read-Punch could read card information into the IBM 1401 processing unit punch cards and separate them into radial stackers. The cards could be easily removed while the machine was running. Maximum speeds for the 1402 were 250 cards per minute for punching and 800 cards per minute for reading. Announced in October 1959, the 1402 was withdrawn from marketing in February 1971.
1403 [1] When introduced in October 1959, the 1403 Printer was a completely new development providing maximum throughput of forms and documents in printing data from punched cards and magnetic tape. The printer incorporated a swiftly moving horizontal chain (similar in appearance to a bicycle chain) of engraved type faces, operated by 132 electronically-timed hammers spaced along the printing line.
1403 [2] The impact of a hammer pressed the paper and ink ribbon against a type character, causing it to print. The chain principle achieved perfect alignment of the printed line and greatly reduced the number of sets of type characters needed. The 1403 printer could produce over 230 two-line documents, such as checks, per minute or the equivalent of a printing speed of 4,800 lines per minute. The 1403 was withdrawn from marketing in February 1971.
1405 [1] The 1405 Disk Storage Unit was introduced in October 1960. To improve on IBM's RAMAC technology, the 1405 engineers doubled two parameters -- tracks per inch and bits per inch of track -- to deliver a fourfold increase in capacity. The 1405 storage units were available in 25 and 50 disk models, with 10 million and 20 million characters each, respectively.
1405 [2] The 1405 was used in Walnut, an information retrieval system that was developed for the U.S. Central Intelligence Agency and delivered in late 1962. Walnut was the first mechanized system that could feasibly store and search millions of pages of documents. The 1405 withdrawn from marketing in June 1970.
1440 [1] Introduced by IBM in October 1962 as "one of the most important new products we have ever developed," the 1440 Data Processing System was a low-cost compact electronic computer designed specifically for small and medium-size business firms.
1440 [2] It incorporated a major achievement in the data storage technology of the time -- disk storage devices designed with interchangeable packs, each containing six magnetic memory disks for a combined storage capacity of nearly three million characters of information.
1440 [3] Besides the data packs, the 1440 contained the following other technological improvements: a card read-punch that used the solar cell principle to read information from punched cards directly into the central processing unit with increased accuracy and reliability; a printer equipped with five interchangeable type bars for greater versatility; a console that contained the operating keys, dials and switches that permitted operator control over the system; and
1440 [4] a central processing unit that had a core storage cycle of 11.1 millionths of a second. The basic system, using the interchangeable disk packs, rented for about $2,600 monthly. The 1440 was withdrawn from marketing in February 1971.
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