Command HQ

Where and when.

• 1991

  Date precision

  Year only

• 1992 · Mac OS^*

  Release date

  1992^*

  Date precision

  Year only^*

  Platform

  Mac OS^*

• 1990 · DOS^*

  Release date

  1990^*

  Date precision

  Year only^*

  Platform

  DOS^*

• 1989-12-31 · DOS^*

  Release date

  1989-12-31^*

  Date precision

  Exact date^*

  Platform

  DOS^*

• 1990-01-01 · Microsoft Windows^*

  Release date

  1990-01-01^*

  Date precision

  Exact date^*

  Platform

  Microsoft Windows^*