There are standard notations in Pop-11 for referring to such things. A few examples are presented here, to introduce ideas used in the following sections. A more comprehensive list is given later in this chapter. Further differences are described later. Sometimes this will produce an error, because the word has no suitable value associated with it.
Vectors are more compact.
Later the differences between vectors and lists will be explained in more detail. Advanced programmers may find it helpful to look at the online REF DATA file, to get a more complete overview of the types of data in Pop-11 and some information about how they are represented in the machine.