Implementation: Software

"If I have seen further, it is by standing on the shoulders of giants" --Isaac Newton (paraphrasing Bernard of Chartres)

busybox/tinylogin/udhcpd:

• combination of several programs in one
• binaries only loaded once

C library:

• libc5 not widely supported
• tend to sacrifice 'glibc' compatibility to save space
• functionality configurable to suit size requirements

Kernels:

• reasonable functionality in under 400K (with v2.0.40)