Master Key Standard Edition Master Key is a straightforward typing tutor program which features standard Mac OS interface elements; Typing drills can be paused; Deleting to previous lines; Comprehensive individual statistics ... Cost: $20 Buy full version       Trial version           Descriptions Master Key Standard Edition: Master Key is a straightforward typing tutor program which features standard Mac OS interface elements; Typing drills can be paused; Deleting to previous lines; Comprehensive individual statistics and history; Breakdown of WPM and Error Rate for each key; Mastery goal for speed and accuracy with certificate print-out; Drills can be any plain text file; Typing instruction tips; Dvorak keyboarding support and drills; Optional audio feedback which can include high quality samples of actual typewriters.