windows forerunner: crossword clues

Matching Answer
Confidence
DOS
95%
MSDOS
90%
AERO
60%
OSS
47%
UNIX
20%
ECU
20%
AEC
20%
PCS
20%
TELEX
20%
ORIELS
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)