My first job after technical school was as a bench technician in the camera service department at Olympus USA in Woodbury NY.
I was trained on and serviced the OM-PC (aka OM-40) camera, 50/1.8 lens and T-20 & T-32 flash units, then current models.
Other techs worked on OM-1/2/3/4 models and the then brand new OM-77AF, plus lenses and other system accessories.
Each camera model uses a dozen or more different types and size screws, mostly tiny.
The floor tiles in our work area were white with small shiny metallic flecks in them.
Once accidentally dropped on that floor small parts would seem to disappear.
The tech would have to weigh the time and embarrassment of searching the floor on hands and knees
with a flashlight versus the time and embarrassment of another trip to the parts room.
Not that this ever happened to me, you understand...
Chris