Bat Editing

Field	Computing, MS-DOS machines
Went Obsolete	WindowsXP ?
Made Obsolete By	Automation of startup routine
Knowledge Assumed	How to write batch files; knowing which files needed to run under which parameters at startup
When useful	On old DOS and early Windows machines

Not Entirely Obsolete. Making a Flash or portable USB drive bootable can require a custom AUTOEXEC.BAT to be present. For fuller explanation, see Wikipedia