What services are used to help speed the development and deployment of internal custom applications?

The radio patrol officer usually cannot receive a message if

a. the microphone switch is "open." b. the microphone switch is "closed." c. the transmitter fuse is blown. d. central dispatch is functioning properly.

____________________ is one of the easiest and safest methods to move one or more files and folders.

Fill in the blank(s) with the appropriate word(s).