In salesforce What are the different type of Collections you can have in Apex?

Collections in Apex can be lists, sets, or maps.
There is no limit on the number of items a collection can hold. However, there is a general limit on heap size.
Lists
A list is an ordered collection of elements that are distinguished by their indices. List elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
Sets
A set is an unordered collection of elements that do not contain any duplicates. Set elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
Maps
A map is a collection of key-value pairs where each unique key maps to a single value. Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
Parameterized Typing.