A-A-55431 Complete Document History
Disk, Flexible, Two-Sided, High-Density, 5.3 Tracks per Millimeter (Tpmm) (135 Tracks

Complete Current Edition:
   REVISION A - DISK, FLEXIBLE, TWO-SIDED, HIGH-DENSITY, 5.3 TRACKS PER MILL - April 17, 1995
   REV A VALIDATION 1 - VALIDATION NOTICE 1, REV A - Sept. 27, 2001
   REV A VALIDATION 2 - VALIDATION NOTICE 2, REV A - Feb. 1, 2007
   REV A VALIDATION 3 - VALIDATION NOTICE 3 FOR REVISION A - Aug. 9, 2019

Obsolete Revision Information:
   BASE - DISK, FLEXIBLE, TWO-SIDED, HIGH-DENSITY, 5.3 TRACKS PER MILL - Nov. 5, 1993