thingsaurus
This is a 'thesaurus for things' or similarity engine: results show things that have something in common with what you enter. The more stars, the more things in common! You can use it for research, recommendations or simply to explore ideas and related subjects.
Here are your results for Sinclair QDOS...
Stars indicate closer matches.
86-DOS 
- DOS Plus
- IBM PC DOS
- Novell DOS
- PalmDOS
- PC-MOS/386
- SCP QDOS
- 68K/OS
- Minerva (QDOS reimplementation)
- AMSDOS
- MSX-DOS
- AppleWorks
- MacPaint
- Music Construction Set
- Psychedelia (light synthesizer)
- SpeedScript
- XyWrite
- Banyan VINES
- Classic Mac OS
- DIP DOS
- DOS/360 and successors
- DR-DOS
- DR-OpenDOS
- MS-DOS
- MS-DOS 4.0 (multitasking)
- OpenDOS
- PTS-DOS
- Apple DOS
- Apple Pascal
- Apple ProDOS
- Atari DOS
- Atari TOS
- Concurrent CP/M
- Concurrent CP/M 8-16
- Concurrent CP/M with Windows
- Concurrent CP/M-86 with Windows
- Concurrent CP/M-86/80
- Concurrent DOS
- Concurrent DOS 8-16
- Concurrent PC DOS
- CP/M
- CP/M-86 Plus
- Cromemco DOS
- EOS (8-bit operating system)
- FLEX (operating system)
- FlexOS
- GEMDOS
- Apple GS/OS
- MP/M
- Multiuser DOS
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