Abstract: A method and apparatus with carrying out computer operations of push and pop. The series of program sections including an interpretive program or module which interprets intermediate code are constructed to consider a series of registers as all or part of a stack for holding operands. Each program section is arranged and considered a different one of the series of registers to be at the top of the stack. The switching from one program section to another to perform the pushes and pops is performed as a function of the register that is at the top of the stack preferably without normally copying the data into the registers. The series of program sections may be ordered in the same sequence as the sequence of the registers that are considered to be at the top of the stack of the program sections.