Complex sentence: It is the hub of all Bangladeshi airlines, including Biman Bangladesh Airlines, United Airways, Regent Airways, US-Bangla Airlines and Novoair.airport's IATA code-- "DAC" is derived from "Dacca", the previously used spelling for "Dhaka".
Split into simpler sentences: It is the hub of all Bangladeshi airlines, including Biman Bangladesh Airlines, United Airways, Regent Airways, Novoair and US-Bangla Airlines. The airport's IATA code-- "DAC" is derived from "Dacca", the previously used spelling for "Dhaka".