What is the difference between the crimes of theft and the crime of forgery?

People v. Neder (1971) 16 Cal.App.3d 846, explained the pertinent difference between the crimes of theft and forgery. "The essential act in all types of theft is taking. If a certain amount of money or property has been taken pursuant to one plan, it is most reasonable to consider the whole plan rather than to differentiate each component part. [Citation.] The . . . crime of forgery, however, is not concerned with the end, i.e., what is obtained or taken by the forgery; it has to do with the means, i.e., the act of signing the name of another with intent to defraud and without authority, or of falsely making a document, or of uttering the document with intent to defraud." (Id. at pp. 852-853.)