dos

noun

1. (form-of, plural)plural of do

   “With the coming of Monday arrived a new life for David—a curious life full of "don'ts" and "dos." David wondered sometimes why all the pleasant things were "don'ts" and all the unpleasant ones "dos."”

2. (abbreviation, alt-of, initialism)Initialism of date of service.
3. (abbreviation, alt-of, initialism)Initialism of date of separation.
4. (Internet, abbreviation, alt-of, initialism)Initialism of denial of service.
5. (abbreviation, alt-of, initialism)Initialism of density of states.
6. (abbreviation, alt-of, initialism)Initialism of director of studies.
7. (abbreviation, alt-of, initialism)Initialism of disk operating system
8. (abbreviation, alt-of, initialism)Initialism of death on scene.
9. (form-of, plural)plural of do

   “In functional harmonic progression, three “Dos” in a row within the Do-Ti test indicate chord changes that can only be this descending third pattern.”

10. (Internet)A denial-of-service attack.
11. A Director of Studies; someone who oversees the scholarly aspects of an institution, including faculty development and curriculum design.

name

1. (abbreviation, acronym, alt-of, historical)Acronym of Disk Operating System, a family of disk-based operating systems.

   “Next, using your word processor or the DOS text editor, you can edit your AUTOEXEC.BAT file.”

   “One way to do that is to turn the PC off and turn it back on again. Then, the PC performs its self-test and boots DOS.”

2. (US, abbreviation, alt-of, initialism)Initialism of Department of State.

verb

1. (Internet, transitive)To commit a denial-of-service attack against.

   “In addition to out-of-spec traffic, malicious packets can contain payloads that cause a system to crash. A packet's payload is taken as input into a service. If the input is not properly checked, the application can be DoSed.”