HP 35s Scientific Calculator - Manual (Page 157)

Vector Arithmetic 10-7
Vectors in Programs
Vectors can be used in program in the same way as real and complex numbers
For example, [5, 6] +2 x [7, 8] x [9, 10] in a program is:
A vector can be entered when prompted for a value for a variable. Programs that
contain vectors can be used for solving and integrating.
Program lines: Description:
   Begins the program
       [5,6]
 