(redirected from Fixed Disk Operating System)
FDOSFirst Day of Service
FDOSFirst Day of School
FDOSFirst Day of Summer
FDOSFlooder Denial of Service
FDOSFloppy Disk Operating System
FDOSFlorida Department of State
FDOSFirst Day of Spring (Rita's promotion)
FDOSFrom Date of Service (various states)
FDOSFinest Depth of Sort (US Postal Service)
FDOSFixed Disk Operating System
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