Application software is a set of one or more programs designed to carry out operations for a specific application. Examples: VOIP Switch Management, Attendance, Security.
A mobile app is a computer program designed to run on smartphones, tablet computers and other mobile devices. Mobile devices run on battery and have less powerful.
Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.