The 6502, for example, makes for a beautiful stack machine, much more so than a Z80. This is why you’ll find most old Forth implementations running on 6502-based machines.

Learn how computers use variables with this KS2 primary computing guide from BBC Bitesize for years 3 and 4.

What are variables? Description Variables are introduced using the example of a squirrel who wants to know where his nuts are buried, and how many he has.

For example, the following statements read quarterly estimates of the gross national product of the U.S. from 1990:I to 1991:II from data records on which dates are coded as separate year and quarter ...