The Linux Subsystem for Windows 9x, led by Hailey Somerville, allows Linux to run within the Windows 9x framework by modifying the Linux kernel to interface with Windows 9x kernel APIs. Users need to create a specially modified Linux kernel (version 6.19) and a disk image with Windows 9x installed. The subsystem can be initiated with the wsl command, enabling both kernels to operate together. This initiative is reminiscent of Cooperative Linux and parallels the Windows Subsystem for Linux (WSL2) on Windows 10 and later. Contributions from the community have been vital to the project's development.