Correct Terminology for Windows Login Formats

What's the correct terminology for referring to the different forms of user identfiers that I come across in a Windows network? To be specific, I have to use these 3 for different systems at my place of employment, Given my name is Fred Flintone and I work at FooCorp, I have to use these various forms depending on the system:

flinstonef

foocorpdomain\flintstonef

[email protected]

What is the correct term to refer to each of these? Thanks


Correct terms for each of these -

Flinstonef - User account name or logon name

Oocorpdomain\flintstonef - Down-Level Logon Name

[email protected] - User Principal Name