Image from page 196 of “Bell telephone magazine” (1922)

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Image from page 196 of “Bell telephone magazine” (1922)
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Identifier: belltelephone6667mag00amerrich
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: [New York, American Telephone and Telegraph Co., etc.]
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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Laboratories people presented evi-snce that computers are at last feasible forse by people who are not specialized injmputer technology. The digital computeras demonstrated as a realistic tool for use1 a rapidly widening range of investigations,gain with significant reductions in the ex-ertise required of the user. Until now, computers have not been fullyxploited because only computer expertsere able to control them. Even expert com-uter programmers have had difficulty inying to apply the computer to activitieseople can carry out with ease. This dilemma; rapidly diminishing, largely because thecientist or engineer is now better able toommunicate with the computer. This im-roved communication is possible becauseew languages for giving instructions to theomputer have been developed which enablefficient programs to be written for a wideariety of special problems. The computer is now not only responsived conventional punched cards and tape, butD the turning of knobs, instructions of light

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Manfred R. Schroeder of Bell Labs, at right.OS impromptu discussion during symposium. pens, and signals from experimental appara-tus. And computer results are displayed inways more easily assimilated by human oper-ators, through the use of graphs, audible re-sponses, charts and motion pictures. The evidence indicated that the termcomputer has become a misnomer. Thehardware it describes is no longer merelya gigantic arithmetic machine because newcomputer software (computer programs orlanguages) has been developed and becausea wide variety of electronic equipment canbe attached directly to the computer. Forexample, with more advanced software andhardware attachments, the computer cannow find hidden insights in complex data anddisplay them. It can draw charts and graphsfrom the data and manipulate symbolicalgebra. It can synthesize delicate subteltiesof speech and repeat them for languagestudies. It can use a carefully constructedform of the English language—with the po-tentiality of a

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Image from page 288 of “Trigonometria” (1657)
Computer
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Identifier: trigonometria00ough
Title: Trigonometria
Year: 1657 (1650s)
Authors: Oughtred
Subjects:
Publisher:
Contributing Library: The Computer Museum Archive
Digitizing Sponsor: Gordon Bell

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Image from page 49 of “dec :: terminal :: vt180 :: EK-VT18X-IN-002 VT18X Upgrade and System Test Guide Jul1982” (1919)
Computer
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Identifier: bitsavers_decterminaT18XUpgradeandSystemTestGuideJul1982_6435163
Title: dec :: terminal :: vt180 :: EK-VT18X-IN-002 VT18X Upgrade and System Test Guide Jul1982
Year: 1919 (1910s)
Authors:
Subjects: module diskette disk drive test terminal controller diagnostic rom error control module controller module terminal controller upgrade kit disk drive disk unit kit installation error messages diskette diagnostic system test
Publisher:

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at-tached to the terminal to run tests 4, 5, and 6. These tests detect failures in the EIA line driv-ers and receivers which are not checked on power-up or during self-test The transmit andreceive baud rates for the terminal must also be identical. 2. The printer confidence tests (7 and 8) send a line of text that you type to the printer. Theprinter must be set up for these parameters. MR-7885 Figure 4-9 Individual Test Menu NOTES: Baud rate: 1200*Bits/charactersParity.None Stop bits: 1 3. The synchronous communications test (9) requires that the terminals transmit and receivespeeds be identical and be at 2,400 baud or less. The communications port is tested in loop-back mode; however, no loopback connector is required for this test. Enter SET-UP B andchange the baud rate if you desire to run this test. *A later revision ROM allows the baud rate to be either 300 or 1,200. This is established using the SET-UP P command.Refer to the VT180 Users Guide to use this command. 40 SYSTEM TEST

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MR-797! Figure 4-10 Loopback Connectors HARDWARE INSTALLATION COMPLETE When the initial test and the extended test of the VT18X diskette diagnostic run successfully onetime, the VT18X hardware installation is complete. If you have a printer on your system, the printerconfidence test should also run successfully. As a final task, make sure the VT180 communicates with the customers host computer. 1. Reset the VT180 by pressing SET-UP 0. 2. The VT180 prints the Main System menu. 3. Ask the customer to check the terminal mode by pressing T and to communicate with the hostcomputer. This ensures that the communications features of the VT180 are set up correctlyfor the host computer. 4. If you cannot communicate with the host computer, you may have to change the commu-nications switches on the VT18X control module (Table 2-1). Check with the system program-mer to find out which communications lines are being used. Refer to the VT180 Users Guide to copy diskettes and run the CP/M software. 41

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