The spear shaft and head are actually writing of some sort.

There are two read heads and two write heads.

Ferrite heads are large, and write fairly large features.

The writer came away convinced that Ludlow's head was full of worthless information, and wrote about it.

In a n-track Turing machine, one head reads and writes on all tracks simultaneously.

The head of the team wrote of the trip:

He looked at what the head had written, shook his head in disappointment.

Our former prep-school head advises the parents of a would-be doctor and writes a report on reports.

Each head still writes one track at a time.

Coincident with 58 tracks were 67 read heads and 13 write heads.