AA

The Objective Scoring System Version 3 (OSS3) is my current favorite.  I use it after I hand score as a backup.  The call is usually the same, but sometimes not.  Occasionally the software disagree with each other.   Most of my clients, who are now much younger than me, seem to prefer to trust it over my hand score.

Although Arkhangelsk disagrees, and I do see his point, as a longtime user, I see a great deal of difference in an ink on paper chart and a digital chart.  Think of the difference between a polaroid photograph and a digital photograph.  The same photo?  Yes, maybe.  But the digital is much easier to crop, zoom in and out, eliminate redeye, adjust color and light.  Things that were impossible with a polaroid.  Measurement of some chart features, such as relative line length, very difficult on paper, is a snap for the software which offer digital calipers. 

My analog recorded four channels, my digital records eight and has in time audio/video recording.