What does YAP stand for?

Yap - Caroline Islands - Airport symbol (OAG)

Yapese - GeoNet three-character language code (GEON)

Yaw and Pitch

Yesterday Afternoon - Telegraphy (PCTE)

Yet Another Ploy (SAUS)

Yield Analysis Pattern - Computer science

Young Americans in Prague - Expatriot Americans in the 1990's

Young Aspiring Professional (WDAA)

Younger American Playwright - Slang

Yttrium Aluminum Perovskite Oxide (SAUS)