Busybox is a fun read on how they got all that functionality into such a small space. It always amazes me that my home router has all those functions because of

Busybox is a fun read on how they got all that functionality into such a small space. It always amazes me that my home router has all those functions because of Busybox being loaded. OTOH, I shouldn't because I think my current router has more CPU / Memory than my first mainframe.