... extending/browsing/zooming etc.5) Support PPT/Word/Excel/PDF files instant operating: edit , indicate, page up/down, save, etc ... pen, etc.7) Support Multi-Media files displaying, such as Pictures, Audio files, Video files, Flash files, ect.8) Auto-recognizing English word/ ... .13) The enclosure management function.Abundant of resources database for each grade of primary and junior high school and each ...