1) the scientific study, technology, industry, concerned with apparatuses such as ration, TV, tape recorders, calculators, computers etc (electronics)

2) a device for joining two computers using a telephone link (modem)

3) ROM; a specific type of memory in computers (read-only memory)

4) a person who serves; a tray for dishes of food; a special computer dedicated for storing great amount of information and giving it to multiple other computers using one and the same system, programme etc (server)