There is almost unlimited potential for educational software, with the graphics, sound and colour of today's micros. Yet some firms still produce software like this - very little more than the traditional textbook seen in most schools.

The tape actually consists of two separate but linked programs. The first, Geometry, autoruns to five smaller sections accessed via a menu.

Each follows a similar pattern, with line diagrams explained by text. There is unlimited time for study, as each successive frame is presented on pressing enter.

Towards the end of each section, there are a few questions, each with three choices of answer. The wrong answer gives another chance, while the correct response too often gave a rather patronizing reply like "Well, that was obvious, because..."

Angles is again a series of questions and answers, along very similar lines. It shares with Geometry a number of minor but irritating weaknesses, such as an odd spelling of "triangle" and some equally bizarre phrases.

P.T.