What is the difference between parking and holding of FI documents?

It is common practice for working professionals to confuse parking with holding. Holding is typically used when a business user needs to attend to an urgent task while he/she was in the processing an FI document (e.g. invoice) while parking is a saved document which is also not posted to the General Ledger but can be  executed by another user. It should be noted that parked documents generate document numbers while held documents do not.