From the NannyMUD documentation

LAST CHANGE

2001-09-29

NAME

        toss_program - toss program - a memory saver

DESCRIPTION

	GENERAL

	The 'toss program' mechanism is the biggest memory saving mechanism
	available to the driver; uptimes would be very much shorter without
	it. You should strive to write objects that can be tossed wherever
	it is possible to have such an object.

	DETAILS

	When the driver loads an object, it will check whether the object
	will only be setup, or if it will change later on. If it will
	only be setup, the driver will remove any program code in the
	object: it 'tosses' the code. This is known as 'toss program'.

	Any object with the following characteristics is a candidate for
	tossing:
	+ it has at most one function, and that is 'reset'.
	+ it has no global variables.
	+ it does not execute any code in reset() when arg is 1.

	INHERITING A TOSSED OBJECT

	If you inherit a tossed program, you basically inherit an empty
	object, which is perfectly legal but probably not what you want.
	In this case you should define an extra function:

	int query_no_toss_program() { return 1; }

	and the program won't be tossed and your inheriting objects will
	be happy.