Texas Instruments TI-99/4A - Page 140

So far, we haven't made much use of your com
puter's memory, because we have been giving
the computer immediate commands to carry out.
For instance, when you told your computer to
PRINTa word, it would print that word on the
screen immediately, and then forget it. But, you
can give your computer the power of total re
call!All you need to do is use what is known as a
line number—which is simply a number at the
beginning of a line of information. The computer
uses line numbers as a means of remembering
what it should do next.
When a collection of line numbers and lines are
typed into the computer, that collection of
information is called a program. A program is
simply a series of
steps which explain what your
computer should do.
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