You will also hear heavy use of phonetics when tower gives taxi instructions, as well runway exiting instructions.
"IF ABLE TURN LEFT AT TAXIWAY BRAVO, CONTACT GROUND ON 148.5, WHEN OFF"
"RUNWAY 2-5-RIGHT, TAXI VIA BRAVO, ECHO-ONE, ZULU, TANGO-TWO, ROMEO."
"RUNWAY 1-8 LEFT, TAXI VIA FOXTROT, ECHO, DELTA, HOLD SHORT OF RUNWAY 1-8 RIGHT"
The phonetics refer to the taxiway designation, they are given letters instead of numbers or names to ease confusion and shorten the length of transmissions. It also easier for pilots to remember letters and glance down at airport diagrams to find them. You will also hear controllers sometimes give progressive taxi instructions to the runway to unfamiliar pilots:
"SWA1762 RUNWAY 2-5, TAXI VIA ECHO, TURN RIGHT ON ZULU-ONE, THEN LEFT ON TANGO."
"SWA1772 FOLLOW THE CONTINENTAL 757 AT YOUR TWO O'CLOCK TO RUNWAY 2-7-LEFT."
People cited the ATIS as being a major phonetic use and it really isn't. The controller will say things like:
"CONTACT GROUND, 132.8, WHEN YOU HAVE INFORMATION MIKE."
"INFORMATION YANKEE NOW CURRENT, ALTIMETER 29.81."