systemd is a replacement for the init daemon for Linux (either System V or BSD-style). It is intended to provide a better framework for expressing services' dependencies, allow more work to be done concurrently at system startup, and to reduce shell overhead.
Using the tooling in this repo, I am able to boot from linux to sinit as PID1, and from there to Emacs acting as PID2 using --script mode, performing all typical rc.boot system initialization using Emacs lisp until we hit the getty.This app doesn't have any features at the moment.
BootVis is a computer application that allows PC manufacturers to check how long a Windows XP machine takes to boot, and then to optimize the boot process, sometimes considerably reducing the time required.
BootVis has been replaced with XbootMgr.