CFU

Call Forwarding Unconditional (i.e. every incoming call will be forwarded). In effect, `do not disturb`.

CFU

Colony forming units
Found on https://www.encyclo.co.uk/local/22446

cfu

Colony-forming unit.
Found on http://ppathw3.cals.cornell.edu/glossary/Defs_C.htm
No exact match found