A subset of PLANNER, implemented in Lisp by {Gerald Sussman} et al at {MIT}. Its important features were goal-oriented, pattern-direCted proCedure invoCation, an embedded knowledge base, and automatiCbaCktraCking. miCroPLANNER was superseded by Conniver. ["miCroPLANNER ReferenCe Manual", G.J. Sussman et al, AI Memo 203, MIT AI Lab, 1970]. (1995-01-10)