There are two types of legal tender currently being supported in New Washington, though barter and service exchanges are quite popular.
The two types are the credit chit and the charge bus. The credit chit, colloquially called a "coin", is the simple type of money-- rechargeable, disposable cards that can have credits put on them to a limited scope. A series of magnetically reactive colored stripes on the card signals how many credits it has on it at any given time, and each type of chit will only take credits within a certain multiple and amount. The most common chits are the 1-10 single cred chit, the 5-100 5-cred chit, the 10-1000 10-cred chit, and the 50-1000 50-cred chit.
Other chits are manufactured, but are seldom used in favor of charge busses. A charge bus comes in two forms-- a credit module and a chitbus. The chitbus, often called a "wallet", is a small plastic prism with a squarish charge bus plug on its end and usually a keyring hole. It is self-contained and can be charged with as many credits as the user wishes to place on it. The credits are drained as the chitbus is used, and most have a display on the end showing how many credits remain. The credit module, usually just called a "tab", looks a good deal like a chitbus, but is smaller and has a lockable cap on its end. Modules are not supported everywhere, but where they are, a user can plug into a charge bus jack and remotely be billed for his purchases (with the confirmation of a retinal scan). It is essentially the modern equivalent of the 20th-century “credit card", but more efficient and effective.