a command that takes a coordinate pair as inputs and moves the current plot pen to that coordinate on the plot
a command that takes a plot name as input and makes that plot the current plot
a reporter that takes a number and a base as input and Reports the logarithm of number in specified base
a command that takes a type of agent and a shape as input and sets the default shape for new agents of that type to the specified shape
a built-in turtle (and link) variable that stores the set of all turtles (or links) that are the same breed as the turtle (or link) calling the reporter
a value that indicates that no agent was found when using one-of, max-one-of, etc.
a command that takes a variable and a value as input and creates a new local (limitedly-available) variable and sets its value to the inputted value
a reporter that takes a set of agents as input and reports a random agent or takes a list as input and reports a random item from the list