A token can have various definitions. Tokens exist in currency systems and computing.
Thoughts on tokens
Fred Ehrsam and Chris Dixon
Why crypto tokens matter
Nick Tomaino and Chris Dixon
Mental models for understanding tokens
Keepers: workers that maintain blockchain networks — when designed correctly, tokens can act like rocket-fuel for driving network effects by incentivizing desired behaviors
Token classification framework — a multi-dimensional tool for understanding and classifying crypto tokens