Format

Z Compressed Data

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Summary

Name: Z Compressed Data
Identifiers: PUID: fmt/1671
Format type: Aggregate
Description: Z Compressed Data are files that have been compressed by Unix's shell compression program, compress. The compress software was developed by Spencer Thomas in 1984 and uses LZW algorithm. The format has lossless data, it can be compressed and decompressed using the Unix and Linux operating systems.
Note: https://en.wikipedia.org/wiki/Compress https://docs.fileformat.com/compression/z/ http://fileformats.archiveteam.org/wiki/Compress_(Unix)
File extensions: z
Submitted by: The National Archives and Records Administration / The National Archives and Records Administration

Internal signatures

Z Compressed Data

Description: BOF; Offset: 0; Magic Bytes: 0x1F9D90

Byte sequences

Min Frag Length: Absolute from BOF
Offset: 0
Max offset: 0
Byte Sequence: 1F9D90
Endianness: None

Changelog

V118

Release date

30 April 2024
- Updated
  
  Z Compressed Data: Name of developer corrected in description. Submitted by Igor Nechaev.
V108

Release date

5 September 2022
- Updated
  
  Z Compressed Data: File extension z decapitilised. Submitted by Preservica.
V105

Release date

29 June 2022
- Added format
  
  Z Compressed Data: Full entry added. Submitted by The National Archives and Records Administration.
- Added signature
  
  Z Compressed Data: Signature researched and samples provided by The National Archives and Records Administration.