Chadless keypunch - definição. O que é Chadless keypunch. Significado, conceito
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O que (quem) é Chadless keypunch - definição

FORM OF DATA STORAGE
Chadless tape; Paper tape; Papertape; Punch tape; Perforated paper tape; Punched paper tape; Paper tape canister; User:HIST406-13CHayes12-1/sandbox; Wikipedia talk:Articles for creation/ Paper tape canister; Paper tape reader; ECMA-10; Paper tape punch; BNPF; BNPF format; BNPF encoding; Intel BNPF; Begin-Negative-Positive-Finish; Begin Negative Positive Finish; BNPF Object Tape; BNPF object tape; BNPF tape format; BNPF file format; BPNF; BPNF format; BPNF encoding; BPNF file format; BPNF tape format; BPNF paper tape format; BPNF Paper Tape Format
  • Creed model 6S/2 5-hole paper tape reader
  • Wheatstone slip with a dot, space and a dash punched, and perforator punch plate
  • Mylar punched tape was used for durability in industrial applications
  • This secure paper tape canister shows evidence of tampering
  • Diagnostic minicomputer software on fanfold paper tape (1975)

Chadless keypunch      
<hardware> A card punch which cut little U-shapes in punched cards, rather than punching out a circle or rectangle. The U's made a hole when folded back. One of the Jargon File's correspondents believed that the term "chad" derived from the Chadless keypunch. Obviously, if the Chadless keypunch didn't make them, then the stuff that other keypunches made had to be "chad". The assertion that the keypunch was named after its inventor is not supported by any record in US or UK patents or surname references. (2000-11-22)
punched tape         
¦ noun a paper tape perforated according to a code, formerly used for conveying instructions or data to a data processor.
paper tape         
¦ noun paper in the form of a long, narrow strip with holes punched in it, used in older computer systems for conveying data or instructions.

Wikipédia

Punched tape

Punched tape or perforated paper tape is a form of data storage that consists of a long strip of paper in which holes are punched. It developed from and was subsequently used alongside punched cards, differing in that the tape is continuous.

Punched cards, and chains of punched cards, were used for control of looms in the 18th century. Use for telegraphy systems started in 1842. Punched tape was used throughout the 19th and for much of the 20th centuries for programmable looms, teleprinter communication, for input to computers of the 1950s and 1960s, and later as a storage medium for minicomputers and CNC machine tools. During the Second World War, high-speed punched tape systems using optical readout methods were used in code breaking systems. Punched tape was used to transmit data for manufacture of read-only memory chips.