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=={{header|PicoLisp}}==
=={{header|PicoLisp}}==
<lang PicoLisp># In PicoLisp there is no formal difference between abstract and concrete
<lang PicoLisp># In PicoLisp there is no formal difference between abstract and concrete classes.
# classes, just a naming convention where abstract classes start with a
# There is just a naming convention where abstract classes start with a
# lower case character after the '+' (the naming convention for classes).
# lower-case character after the '+' (the naming convention for classes).
# This tells the programmer that this class has not sufficient methods
# This tells the programmer that this class has not enough methods
# defined to survive on its own.
# defined to survive on its own.