Click on a link to download a usable copy of the template. (ComLegSW) (PAT-024 - ) PAT-024 - Checklist for Choosing Off-The Shelf Software Topic 6.4, Also in SWE-027 and Commercial and Legacy Software category. (PAT-025 - ) PAT-025 - Checklist for Choosing a Real Time Operating System (RTOS) SWE-027, tab 3.1, Also in Topic 6.3.