An Object-Oriented Language
Regular: Everything is an object
Syntax:
13 Integer literal
3.14 Floating point literal
"sam String literal
"`The rain in Spain' String literal with spaces, special characters
foo Variable name
(13, 42) Pair
(1 2 3 4 5) List
[13 add: 42] Method call
{(x) [x add: 1]} Block