| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a keyboard enabling a user to perform coordinate input work without shifting hands from home positions. <P>SOLUTION: In the keyboard mounted with a track ball, the track ball is set on this side of a space key, and a left click button and a right click button are set on the left side and the right side of the track ball, whereby the input work can be performed without breaking the home positions. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
