Technical press release

The following is the text of an IBM Data Processing Division technical press release distributed on February 11, 1965.

The IBM 1130 computing system is a desk-sized, stored program computer for low-budget problem solving.

Its basic configuration, with memory capacity of 4,096 16-bit words, memory cycle time of 3.6 microseconds, and a paper tape reader and punch, has a monthly rental of $695. Memory capacity can be expanded to 8,192 16-bit words.

A single-disk direct access storage cartridge for the 1130 enables individuals to maintain and load into the computer their own special programs and working data. Each disk can store 512,000 words -- the equivalent of more than one million characters.

A new low-cost printer, a graphic output plotter, punched tape and punched card units broaden the application capability of the 1130 computing system.

Users of the new computer will range from scientists and engineers to small manufacturing and distribution firms. Newspapers and others in the graphic arts industry, will use the 1130 for preparation of copy for automatic typesetting and photocomposition. Distribution firms such as bakeries and dairies will use the computer for control and accounting of delivery operations. Public utilities, construction firms, consultants and state and local governments are also expected to employ the 1130 for desk-side problem solving.

More than 50 application programs have been prepared by IBM for industries such as petroleum, publishing and civil engineering. Two packages of programs for research applications will help speed the solution of mathematical and statistical problems.

If an engineer wants to solve a set of simultaneous equations, for example, he loads the mathematical programs into the 1130. The programs may be stored on punched cards, punched tape or a disk cartridge. Using a control card or the 1130 keyboard, he calls out the routine for solving simultaneous equations. Then he enters his data and the computer quickly solves the equation. The solution for simultaneous equations is one of 25 programs available in the mathematical and statistical program package.

The programs prepared by IBM are made available to 1130 users without charge.

Disk Storage

A major advance available with the 1130 computer is a direct access storage system. One model of the computer has a built-in disk drive. The IBM 2315 disk cartridge, which fits into the drive mechanism, provides a convenient way for individuals to store their own programs and data.

A single direct access disk is encased within each protective plastic cartridge. The disk can be held by the user in his own desk or office cabinet. When the user needs the program, he merely slips the entire cartridge into a slot in the computer.

When the cartridge is inserted in the 1130, the disk itself is engaged in two ways. A power drive causes the disk to spin at 1500 revolutions a minute. At the same time, a forked arm extends to read and write on both magnetic surfaces of the spinning disk. Programs can be transferred from the disk to the 1130's core memory at the rate of 35,000 16-bit words a second.


The IBM 1627 plotter, another device for use with the 1130 computing system, receives numerical data from the computer and converts the information to graphic form. This is particularly valuable in applications such as petroleum exploration, in which a graph or map may be more meaningful than a list of numbers.

One model of the 1627 provides an 11-inch wide plotting surface. It plots 300 points a second in increments of 1/100th of an inch. The second model provides 29-1/2 inches of drawing surface, and plots at 200 points a second in increments of 1/100th of an inch.

An IBM program will enable users of the plotter to modify numerical data before it is drawn by the plotter. Contouring, smoothing, approximation and map annotation are four of the nine functions in the numerical surface techniques and contour map plotting program. The program will expedite the use of the plotter since many of these tasks must be performed before meaningful results can actually be drawn.


The new IBM 1132 printer is the lowest-cost on-line computer printer ever announced by IBM. It rents for $275 a month. With a 48 character set, the 1132 printer can produce 80 lines of alphameric copy a minute. If numeric results of computation are desired, a numeric character set will increase printing speed to 110 lines a minute. The 1132 supplements the 15.5 character-a-second console printer and enables the computer to produce business reports comparable in appearance and content to those produced by much larger computers.

Paper Tape

Paper tape devices that can be employed with the 1130 are the IBM 1054 paper tape reader and the IBM 1055 paper tape punch. These devices will enable the 1130 user to generate numerical control tapes for machine tools and messages for subsequent transmission to distant points over communications lines. Paper tape can be employed for storage of data produced by the computer. The paper tape reader also will serve as an input unit for entering data which has been recorded at a remote location.

Both the 1054 and 1055 employ the six-bit IBM standard perforated tape and transmission code with odd parity. Punching and reading speeds each are up to 14.8 characters a second.

Punched Cards

Card input and output is achieved through use of either of two new models of the IBM 1442 card read punch. Model 6 reads at 300 cards a minute and punches at 80 columns a second. The rate at which cards are punched depends on the number of columns punched in each card. For faster processing of cards, Model 7 provides reading at 400 cards a minute and punching at 160 columns a second.


A monitor program will be provided with all 1130 computing systems having disk storage facilities in order to simplify program writing and ensure efficient system use. The monitor will oversee the running of all other programs and supply them with often-used routines such as those which control input and output and those used to handle console inquiries.

The monitor speeds new program preparation by supplying many routines that would otherwise have to be included in each program and by simplifying the testing of new programs.

The monitor helps make the 1130 more efficient by speeding transition from job to job and by permitting it to overlap processing with running of input and output devices.

A FORTRAN compiler also will be provided to users of the 1130. This language speeds solution of mathematical problems since it allows an engineer or scientist to instruct the computer in language familiar to him.

All programs written in FORTRAN for the 1130 can be run on configurations of the IBM Systern/360 with comparable input and output units. All the user need do is reprocess the program with the FORTRAN compiler supplied with System/360.

A basic IBM 1130 computing system will rent for $695 a month, and sell for $32,280. Typical system prices for the 1130 with disk storage facilities will be $895 a month rental, and $41,280 for purchase.

Deliveries of the 1130 are scheduled to begin in the fourth quarter of 1965. The 1130 computing system will be manufactured at IBM facilities in San Jose, Calif. It also will be manufactured by the IBM World Trade Corporation in Greenock, Scotland, for customers outside the United States.