U-Code
Universal Pascal Code.
Intermediate language, a generalisation of P-code for easier optimisation.
Developed originally for the Los Alamos Cray-1 and the Lawrence Livermore S-1.
A refined version currently used by MIPS compilers is descended from one at Stanford U.
"Machine Independent Pascal Code Optimisation", D.R. Perkins et al, SIGPLAN Notices 14(8): 201-201 (1979).
"A Transporter's Guide to the Stanford U-Code Compiler System", P. Nye et al, TR CSL Stanford U, June 1983.