Borning, Alan "ThingLab - A Constraint-Oriented Simulation Laboratory" Xerox PARC Report SSL-79-3 July 1979
(1979)
Languages mentioned
ABSET
{1970} Set-based language
Constraint Algol
{1964} Algol 60 with constraints
CONSTRAINTS
{1978}
KRL
{1977} Knowledge Representation Language
REF-ARF
{1970}
Sketchpad
{1962} Interactive graphics environment
Smalltalk-80
{1980}
ThingLab
{1979}