In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for representing data on magnetic media. The first, used in magnetic tape since 1973,), Micropolis endorsed data encoding with group coded recording to achieve formatted capacities of (single sided) / (double-sided) on 96&nbsp;tpi media<!-- (physical geometry: 80&nbsp;tracks&nbsp;× 1/2&nbsp;heads&nbsp;× (11-19) variable sectors&nbsp;× 512&nbsp;bytes, FAT12 file system, unknown logical geometry and FAT ID) -->. The GCR code is identical to the Commodore one.

=== Brother ===<!-- used in redirects -->

Starting around 1985, Brother introduced a family of dedicated word processor typewriters with integrated 3.5-inch 38-track

References

Further reading

  • ANSI INCITS 40-1993 (R2003) Unrecorded Magnetic Tape for Information Interchange (9-track, 800&nbsp;bpi, NRZI; , PE; and , GCR)
  • ANSI INCITS 54-1986 (R2002) Recorded Magnetic Tape for Information Interchange (, GCR)
  • <!-- info on GCR -->
  • (NB. Mentions the 5/4 RLL code used on tape drives.)
  • (NB. Additional detail on the GCR tape format.)
  • (NB. Application No: US . See also: CA993998A, CA993998A1, DE2142428A1)
  • (NB. Application Number: US 5/904420)
  • (NB. Application Number: US 06/559210. See also: CA1208794A, CA1208794A1, DE3443272A1, DE3443272C2)
  • , ,