Generate random version 4 UUIDs (also called GUIDs), up to 500 at a time, with uppercase and no-hyphen options.
A universally unique identifier is a 128-bit ID written as 32 hex digits, such as 3f1c2a9e-8b4d-4e2f-a1c7-5d6e7f8a9b0c. Version 4 UUIDs are random: the chance of two ever matching is negligible.
They're used as database keys, request IDs and file names.
Yes. GUID is Microsoft's name for the same thing.