I've listed most of the standard System components that'll be installed (from MacOS 7.53 to 7.6) and what they do exactly, these are; Control Panels, Extensions, Libraries, System Enablers and loose items in the System Folder. Some of these Extensions and Control Panels may not be available on an Amiga but they are usually installed anyway - I've highlighted these with a bold message.
There are two excellent self viewing documents which explains every single System component in detail, and they're called Extension Overload and InformINIT. Both cover Systems 7.x to 8.x, and include all of Apples's standard System files and most known third party Extensions and Control Panels - both have very useful additional info concerning: Libraries, Enablers and other types of files.
To go straight to one of these catagories, click one:
Control Panels Extensions Libraries System Folder System Enablers
Mac 68k ROMs & Compatible Systems