KeyCAD

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File Format
Name KeyCAD
Ontology
Extension(s) .key, .sym
Type Code KEYS
Released 1993

KeyCAD Complete & KeyCAD Pro was inexpensive CAD/Modeling software produced by Softkey for Macintosh and Windows.[1][2] Earlier DOS version may have had KCF extension. Later versions produced by the Learning Company who bought Softkey.[3]

Contents

File Information

KeyCAD version 1 for Windows and Macintosh have the same format. KeyCAD for Windows version 2 is different but still uses same extension. Macintosh files have similar format to Windows versions.[4]

  • KEY are drawing files.
  • SYM are symbol files.

KeyCAD for Windows 3 uses a new format using extension KCW which is a Microsoft Compound File. No longer uses symbol files.

Format Information

  • KEY & SYM version 1 files have the hex values 00000064 for the first 4 bytes.
  • KEY & SYM version 2 files have the hex values 00000096 for the first 4 bytes.

KEY files seem to end with hex values 0190

Software

References

  1. https://archive.org/details/keycadcompletefo00soft/mode/2up
  2. https://www.computerhistory.org/collections/catalog/102778223
  3. https://en.wikipedia.org/wiki/The_Learning_Company_(formerly_SoftKey)
  4. http://techrx.blogspot.com/2007/04/keycad-mystery.html
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