TH1 (literally "Test Harness #1") was originally conceived as a minimalist reimplementation of TCL sufficient to run the TCL-based SQLite test suite on SymbianO

TH1 (literally "Test Harness #1") was originally conceived as a minimalist reimplementation of TCL sufficient to run the TCL-based SQLite test suite on SymbianOS. That use case never materialized. But later, when I needed a small and lightweight scripting language for Fossil, TH1 was drafted for that alternative purpose.