A key point to these tools (from a practical point ) is that they are very memory efficient and allow work on just a "line".

Learn how to use a host of Linux commands in these 2-minute video tutorials from Sandra Henry-Stocker, author of the Unix as a Second Language blog. Learn how to use the powerful bc command in Linux ...

Apropos of nothing in particular, I remember back in the 80's Byte magazine having an article about using monode (single pole) semi-conductors to implement WOM (Write Only Memory). The 8bit I/O chips ...