Nucleol - a minimal list processor
J. Nievergelt, F. Fischer, M. I. Irland, J. R. Sidlo · ACM SIGSAM Bulletin · 1969
NUCLEOL is a low-level list processor designed as a basis in terms of which higher-level list- and string-processing languages could be implemented easily and efficiently. Hence its design aims at: a) Simplicity b) Complete and concise description c) General data structures and a small, well-chosen set of primitive operations d) A scheme for implementation which makes it easy to transfer the system from one computer to another. The system is currently implemented as a PL/1 program.