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The defining feature of modern computers which distinguishes them from all other machines is that they can be programmed. 1_______.
In most cases, computer instructions are simple: add one number to another, move some data from one location to another, send a message to some external device, etc. 2_______. However, there are usually specialized instructions to tell the computer to jump ahead or backwards to some other place in the program and to carry on executing from there. 3_______. Furthermore, the “jump” instructions may be made to happen conditionally so that different sequences of instructions may be used depending on the result of some previous calculation or some external events. 4_______.
That is to say that the list of instructions (the program) can be given to the computer and it will store them and carry them out at some time in the future
These instructions are read from the computer memory and are generally carried out (executed) in the order they were given
These are called “jump” instructions (or branches)
Many computers directly support subroutines by providing the type of jump that “remembers” the location it jumped from