drwxr-xr-x 2 1011 1014 4 May 22 2018 . drwxr-xr-x 1033 1011 1014 1034 Mar 23 23:02 .. -r--r--r-- 1 1011 1014 351372 May 22 2018 300771-001_Mouse_Systems_Optical_Mouse_Technical_Reference_Models_M2_and_M3_1985.pdf -r--r--r-- 1 1011 1014 519574 May 22 2018 Mouse_Systems_M-2_Optical_Mouse_Technical_Reference_Jan1984.pdf