The most popular is a Panasonic Tough Book, but there are others. They mainly use small, cheap computers that can complete simple tasks.
computers typewriters
They use them in all kinds of ways. They use them for coordinating calls, paperwork, communication and much more.
Computers users.
computers typewriters
you can really use any kind you think is right for your computer
MjolkDrikker 22mm
The vast majority of the modern world.
Computers do not produce energy, they use/consume energy.
The same vacuum tubes used in radios.
They use science for things like radars, computers etc. so they can see the criminals
Analog Computers use physical things such as mechanical, electrical and hydraulic aspects to model the real world. These include slide rules and nomographs.
Lights and computers use electrical energy. The production of heat is an unwanted side effect, but it gets produced from the use of this same electrical energy.