NCSS is a computer program for statistical/data analysis created in 1981. NCSS LLC is the name of the company that produces NCSS. NCSS LLC also produces PASS (Power Analysis and Sample Size). NCSS LLC specializes in providing statistical analysis software to researchers, businesses, and academic institutions.
NCSS (originally, Number Cruncher Statistical System) includes over 230 documented statistical and plot procedures. NCSS imports and exports all major spreadsheet, database, and statistical file formats.