abstract
assemble
assembly
board
brown
center
chip
circuit
closeup
component
computer
electrical
electricity
electronic
engineer
equipment
examining
face
facilities
guy
human
industrial
industry
interior
job
lab
laboratory
maintenance
male
man
microscope
old
oscilloscope
person
repair
repairman
researcher
scientist
senior
service
shop
support
tech
technical
technician
technology
testing
tool
work
worker