#USPTO: 15.05.04 - PDA (personal digital assistant), Tablet computers, handheld, MP3 Players, Digital music players, Handheld video game players, Video game players with screens, handheld, Tape drives (computer) #USPTO: 15.05.07 - Computer towers, CPU (central processing unit), Mainframes, computer, Servers, computer, Tape drives (computer), Drives for computers, Hard drives, USB drives, not including cords, Flash drives and dongles, Removable memory drives, Memory cards, Electronic card reader, Readers for electronic chips and cards #USPTO: 26.09.14 - Squares, three or more, Three or more squares #USPTO: 26.09.20 - Squares inside one another