abs, 33, 146, 150
abstract objects, 51, 238 acos, 152
actual parameters, 26, 86
Algol 60, 5
and, 35, 60, 97
angle, 150
append, 44, 136
apply, 95
arbitrary precision, 139
asin, 152
assignment, 91
assignments, 45, 91
assoc, 138
association list, 138, 234
assq, 138
assv, 138
atan, 152
atom?, 39
auxiliary keywords, 59, 187