Pampanga was already the site of thriving settlements along riverbanks or “pampang” before the Spaniards came. The inhabitants were referred to as “Kapampangans” or “the people by the river bank.”
Philippines Cuisine Characteristics
Vinegar is a common ingredient. Adobo is popular not solely for its simplicity and ease of preparation, but also for its ability to be stored for days without spoiling, and even improve in flavor with a day or two of storage.
Tinapa is a smoke-cured fish while tuyo, daing, and dangit are corned, sun-dried fish popular because they can last for weeks without spoiling, even without refrigeration.
More details at Philippines Cuisine Characteristics