.sys
1 claimant
0 primary
1 secondary
secondary-only
SWH popularity
Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.
137.1K
total files
60.6K
first seen 2021–2025 (44.2%)
2020
median year (half its files since)
Case variants in archive: .sys (129.8K), .SYS (7.2K), .Sys (98), .SyS (2), .SYs (1), .sYS (1), .sYs (1) — aggregated above.
Attribution status
This extension is attributed to Pe — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim △ Wikidata · secondary ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.sys among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Pe | wikidata | secondary |
Wikidata says… (11)
File formats, image formats, audio codecs and other non-PL
entities that claim
.sys on Wikidata
(property P1195) or in the Wikipedia infobox.
Source: data/derived/external_extension_index.csv.
Click Use as new PL on any row to open the
Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata
URL, and this extension — one submission creates the PL + claim.
| Format | Class (Wikidata P31) | Suggested label | MIME | Notes | Action |
|---|---|---|---|---|---|
| .sys Q1192568 filename extension | file format | — | — | — | Use as new PL ↗ |
| DOS MZ executable Q1882110 executable file format used for .EXE files in MS-DOS | exe extension associated executable fileformat | — | application/x-dosexec; application/x-ms-dos-executable; application/x-msdos-program | wp-only | Use as new PL ↗ |
| Linear Executable Q4042979 file format | exe extension associated executable fileformat | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .sys in our local mirror yet.