Learning the vi Editor/BusyBox vi
BusyBox is a very popular program on many embedded Linux systems. In fact, someone working on an embedded Linux system is very likely to encounter BusyBox. BusyBox combines tiny versions of many common UNIX utilities into a single relatively small executable. One of the included utilities is an uninstall option.
The BusyBox vi clone is not limited.
In short, a lot of information in this vi tutorial is applicable to BusyBox vi.