# SOSFUNC Library Functions

> [HTML Version](sosfunc-library-functions.htm)

_New February 2026_

A-Shell's Shared Open Source FUNCtion Library, SOSFUNC, contains a large set of functions in source code that are technically user-defined but are of general use, developed by others and maintained by MicroSabio. The master library is maintained in the 907010 directory of the [MicroSabio SOSLIB Repository](soslib.md) which you can browse online. To take maximum advantage, create an [ERSATZ](ersatz_lit.md) definition pointing to a \[907,10\] directory on your system and download the complete set, checking occasionally for updates. Use the [FUNCIDX](funcidx_lit.md) utility to browse it locally by keyword, file or function name.