An Algebraic Language for the Manipulation of Symbolic Expressions (1958) [pdf]softwarepreservation.org·3 pts·kbp·0
Warren's Abstract Machine: A Tutorial Reconstruction (1991) [pdf]wambook.sourceforge.net·46 pts·kbp·6
An Algebraic Language for the Manipulation of Symbolic Expressions (1958) [pdf]softwarepreservation.org·171 pts·kbp·12