MAGRAV2 is an interactive program for modelling magnetic and gravity data that runs on IBM personal computers (IBM-PC), or compatibles. The program allows forward and inverse 2.5 dimensional modelling of gravity and magnetic anomalies from up to 10 bodies. Bodies are defined by their vertical cross-section and their strike extent. The program is written for a microcomputer equipped with a high-resolution colour monitor in addition to a standard text monitor. The high-resolution colour monitor is used to display measured and calculated anomalies as well as the colour-coded body cross-sections while the text monitor displays only text information. Program control from either a graphics tablet or the keyboard is possible. The software is written in Microsoft FORTRAN 77 with one 8088/8086 assembler subroutine for sound generation. Colour graphics are handled by the Multi-Halo graphics subroutine library. Multi-Halo is device-intelligent, allowing this software to be adapted to numerous different graphics peripherals. Other software for this workstation configuration to allow display and enhancement of geophysical imagery will also be made available in the future.