A computer is used ...

  for writing reports. 
  to send e-mails.

A fax machine is generally used ...

  to send documents.

Robots are used ...

  for doing boring jobs.
  to manufacture cars.

Satellites are used ...

  to transmit information.

A telephone is usually used ...

  for talking to your friends.
  to talk to your relatives abroad.

A CD-ROM player is used ...