disc operating system
(US disk operating system) Computing
noun
An operating system that allows the use of disks; specifically any of various such operating systems developed for IBM personal computers; abbreviated DOS; now frequently historical.
Origin
1960s; earliest use found in Computers and Automation.
- red-headed honeyeater
- red-headed linnet
- red-headed pochard
- red-headed smew
- red-headed stepchild
- red-headed wigeon
- red-headed woodpecker
- Red Heart
- red-hearted
- red heat
- red-heeled
- red helleborine
- red hematite
- red hemp-nettle
- red henbane
- red herring
- redhibition
- redhibitory
- red hickory
- neutralist
- neutralistic
- neutrality
- neutralization
- neutralize
- neutralizer