What is Quik-Call II & Decode Selective Call/Call Alert?

Selective Call: Allows receipt from a specific group or individual
Call Alert: Receives notification from a specific group or individual user with an alert tone and lighted LED

What is MDC 1200 Push-to-Talk Identification Encode?

Sends unique digital ID information when transmitting (PTT ID), which can be displayed on radios equipped with MDC decode