Is it appropriate to invite co-workers and boss's from work to your wedding?

If you are also friends with them and have social contact beyond your office contact, you can certainly invite them to your wedding. But they should not be just casual acquaintances, which would probably cover most of your co-workers. Inviting them or not may also depend on the size of your guest list and your budget. Typically, business associates and coworkers can be the first to drop off your list, if you need to cut it down a bit. You could send them wedding announcements after the fact, which can also include your name preference (changing or keeping your maiden name, etc.) and new address, etc. If you have many co-workers who you feel close to, but did not invite to the wedding, you could have a casual postwedding party or after-work affair when you return from your honeymoon.

If you work in a very small company and there are a very few employees, you may consider inviting them because this is generally a much more intimate group than that of a larger company. It also depends on the size of your budget, any limitations on reception seating, etc.