A caretaker Computer! Math, finances, statistics, combinative, factorials, calculations of dates, curves y=f(x), series, units conversions, calendars conversions (Gregorian, Julien, republican), Triangle mutual geometry, Pi computing (10.000 digits) and statistical approach, physicist series, President developments, functions : Gamma, Bessel, Bernoulli, Fisher, maturity numbers, fractionals, factorization, calculations on Byzantine numbers, equations solver, famous curves and surfaces, quadrics, orthodromy and loxodromy, currencies rates, amounts in letters, Romans. Elements, Molar group calculation, fleshly and chemical constants. 40 customary automobile diagrams. Conversions of bases(2 to 36), ASCII/Unicode. Nice Divx Bitrate Calculator (frames, audio, tracks, support, etc). Astronomy: Geocentric and Copernican international co-ordinates. Simulation 3d of the Solar system. Calculation of positions of Mars, Jove and Saturne satellites, with 3d animations. Ballade in stars. Equatorial planets Projection. Games: Gravitation (shootings, undersailors), disorganised pendulum, Satellites, Game of Life, Invaders, Tetris, Biorythms, Billiards model (French, Indian), Tic TaC Toe, Quotations, Hex, land Geography, Lunar landing…