Independent creator, Tyler Akins, released Marco, construction/survey software for Palm OS devices. Programs in Marco include: intersect (line-line, line-circle, circle-circle), center line for lines and curves, proportion, inverse, area of a polygon, triangle solution, and horizontal and vertical curves. The program also includes a solver for grading PIs, proportional increases/decreases and quadratic formulas. An angle converter quickly adds and subtracts angles. Marco includes a multiple point database, an intuitive interface, separate project point files and a built-in point editor. Marco has been thoroughly tested by the Minnesota DOT. Marco updates are posted to the creator's website and are supplied to purchasers free of charge. (Tyler Akins, Brooklyn Center, Minn.)