Operation setting a bit when either corresponding bit is set.

Excessively nested callback-based asynchronous code.

Property ensuring an operation behaves as indivisible.

Operation setting a bit when corresponding bits differ.

HTTP mechanism controlling caching behavior.

Access control based on attributes of users and resources.

Operation complementing each bit.

Removal of data from a cache.

Cookie containing or representing authentication state.

Call that waits until an operation completes.