Definitions for "BLF"
Transonic Systems' laser Doppler flowmeter employing the Bonner algorithm.
Keywords:  lamp, trunk, phone, hook, field
Busy lamp field. Shows who is on the phone.
BUSY LAMP FIELD. A piece of phone system equipment with an array of indicator lights that gives a visual indication that a line, trunk or station is in use or off-hook.
British Lung Foundation. National charity concerned with people living with Lung Disease