FreeCOM is a COMMAND.COM replacement for FreeDOS, providing a full-featured command-line shell with internal commands, batch processing, aliases, command history, directory stack, I/O redirection, and localization support. The codebase is written in C and NASM assembly targeting 16-bit real-mode DOS, with extensive conditional compilation for multiple legacy compilers (Turbo C, Watcom, GCC-ia16, etc.). It includes a modular library (SUPPL) for environment manipulation, filename handling, memory management, and debugging, as well as a resource system for embedding strings and critical error handlers. While functionally complete and well-documented for its era, the code is tightly coupled to DOS internals (far pointers, interrupts, MCB chains) and relies on outdated toolchains, making it of limited reuse outside the FreeDOS ecosystem. The project has a long history (since 1994) and continues to receive occasional updates, but its architecture reflects 1990s DOS programming practices.