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Apple Menu > System Preferences > Accounts > Login Items.

The above is correct, but only for USER-defined items.

There is also a Start-up items folder in System>Library>Startup items. It has system-defined items in it, and possibly some apps that install OS-level data (not many, mainly haxies).

Be VERY careful about removing anything from this folder unless you know exactly what it is & what it does 😛
 
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