The present reports on the using of electronic computers to screen product reliability. The linear discrimination method is one of the reliability screening methods. Being linear discriminant and a multi-varible analysis method, it is very suitable for screening product reliability with a linear discriminant concluded by the effective parameters when the reason of failures is unknown. The amount of work or calculation will increase with the number of effective parameters. Therefore, it is. very useful to the electronic computer. The authors make a statistic inspection on the effective parameters and set up a screening standard. In order to apply the method to practical use, the authors offer some samples of screening elements by linear discriminants. As a result, the calculation with an electronic computer becomes a software of screening product reliability.