Subtract Paper / Digital Folder

Nowadays in a fast pace world,people rely heavily on digital product especially Notebook or PDA.But mostly the work are focus on document processing and browsing.“Subtract Paper” is a new format of digital folder,handy and easy to use just like the folder but made in OLED touch screen with memory card slot on the upper edge,read once a memory card put in,the screen will show it content on the left side just select by touch,the document will show in right side screen.