A single industrial theatre spotlight hanging from the top and seen from the side. 

Spotlight 

Large tv camera with external microphone on a tripod seen from the side.

Camera On Tripod With External Microphone

A large empty monitor screen on two legs or stands. 

A computer monitor or TV screen, facing back.

A large film or tv camera on a rolling stand. 

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.