The Macintosh SE was a followup to the very popular Macintosh Plus, it was released in March 1987, at the same time as the Macintosh II.

The stock specs are:
  • 7.8MHZ 68000 CPU
  • 1MB RAM (expandable to 4MB)
  • 20 or 40MB Hard Drive (or second Floppy drive in base model)
  • 800K Floppy drive (later upgraded to 1.44MB superdrive in SE-FDHD)
  • 9" 1-Bit mono 512x384 CRT
  • PDS Expansion slot

The SE was the first Macintosh to use the new ADB ports for keyboards and mice, ADB had been previously released in the Apple IIgs.