Golden Stair, The

Six modes of operation for line, bar and pie charts. RPNZL application. 16K.

Challenge yourself to command your craft through a storm of interstellar debris-your skills as pilot and gunner will be stretched to their limits. 16K.

Your mission is to patrol the mountainous regions of Phelld for the demonic craft of the Cyborg. Do not waste your firepower but, if the demon hits you, you walk home. 16K.

Reverse Polish Notation ZX81 Language is a FORTH-like language. Faster than Sinclair BASIC, support for structured code and faster tape load/save. 16K.

Enter appointments and short memos in any order. Retrieve them by day, week, month or year. Holds at least 75 items; up to 250. RPNZL application. 16K.

The desperate herd roams a hot torrid plain, grazing on the patchy brush, always seeking more until they find it or starve. They reproduce only if they can eat enough. The rains come bringing thick vegetation, but the herd’s gluttony leads to a population explosion—then famine, and the beasts starve in droves. You control metabolism

Uses one letter commands: direct the turtle to draw just about any figure desired. Sequences of up m 255 steps can be programmed. 16K.