Home · Extensions · .4th

`.4th`

1 claimant 1 primary 0 secondary unambiguous primary

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.

16.6K

total files

4.3K

first seen 2021–2025 (25.6%)

2017

median year (half its files since)

Case variants in archive: .4th (15.9K), .4TH (773), .4Th (1), .4tH (1) — aggregated above.

Attribution status

This extension is attributed to Forth as primary by 1 authoritative claim.

Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✓ Wikidata · Q275472 ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (2)

Languages that list .4th among their extensions. Strength reflects whether the upstream source treated it as their primary extension.

Language	Source	Strength
Forth	wikidata	primary
Forth	linguist	secondary

SWH-mined examples (1)

Real archived programs with this extension, byte-verified against the SWH archive, grouped by predicted language and by how the prediction was made. Useful for deciding what this extension actually is when the attribution is uncertain.

Forth (1) — 1 via fallback

brand.4th · 2771 B · seen 3× in SWH

predicted: Forth via fallback

swh:1:cnt:6c7cea584ebaf581b5eaafba0d26faeb844431ff;origin=https://github.com/freebsd/freebsd-src;anchor=swh:1:rev:26a58599a09a6181e0f5abe624021865a0c23186;path=/stand/forth/brand.4th

Open in SWH · Raw bytes