Twitter followed in the footsteps of Github by removing coding terms associated with slavery.
Twitter has abandoned the use of “master” and “slave” terminology in its programming code. The terminology has links, obviously, to the slave trade.
On June 2, Twitter released a list of “non-inclusive” terms common to programming which they would excise from common use. “Master” and “slave” will turn into “leader” and “follower”; “whitelist” will turn into “denylist” and the gendered “guys” will become “folks.”
More information:
https://decrypt.co/34654/twitter-replaces-non-inclusive-coding-terms-with-newly-approved-speech