UUID is an acronym for 'Universally Unique Identifier'.
GUID is an acronym for 'Globally Unique Identifier'.
You can use GUID codes as serial numbers for Windows & Mac software, or coupon codes for your online stores, etc.
GUIDs are usually stored as 128-bit values, and are commonly displayed as 32 hexadecimal digits with groups separated by hyphens, such as {342AF898-112B-3D49-9E79-15501469165A}.
GUID versions have different uniqueness properties and probabilities, ranging from guaranteed uniqueness to likely non-uniqueness.
GUIDs are a very useful tool for your web and application developers.
A short identifier can be created by applying a modified version of base 36 or base 64 encoding.