Bigsteps is a DOS-based Rasch measurement program. It has most of the functionality of WINSTEPS, but lacks a Windows interface and recent enhancements. Its capacity is 3,000 items and 20,000 persons (cases). You may copy, distribute and use it without charge or time-limit. Of course, we hope you will want to purchase the full version of WINSTEPS (which can analyze 30,000 items and 10,000,000 persons, and has many other additional capabilities).