zless − file perusal filter for crt viewing of compressed text
zless [ name ... ]
Zless is a filter which allows examination of compressed or plain text files one screenful at a time on a soft-copy terminal. It is the equivalent of setting the environment variable LESSOPEN to "|gzip -cdfq %s", and then running less. However, enough people seem to think that having the command zless available is important to be worth providing it.