Final count of registered Psychtoolbox-3 installations at May 20 2018 23:08:23.
Total number of downloads + updates     : 261010
Not counted downloads due to invalid id : 8488
Not counted in total due to invalid id  : 24887
Total number of unique installations    : 96673
Number of PTB's updated at least once   : 27229
Breakdown of installations by Psychtoolbox flavor:
'beta'/'current'              : 86302
'unsupported' aka 'stable'    : 683
'trunk'                       : 36
Psychtoolbox-3.0.7            : 0
Psychtoolbox-3.0.8-PreTiger   : 5
Psychtoolbox-3.0.8            : 26
Psychtoolbox-3.0.9            : 17
Psychtoolbox-3.0.10           : 84
Psychtoolbox-3.0.11-PreWinGst : 1
Psychtoolbox-3.0.11           : 2237
Psychtoolbox-3.0.12           : 97
Psychtoolbox-3.0.13           : 72
Unclassified                  : 7105
Estimated breakdown by host operating system (*):
MacOS-X all                  :    28559 ( 29.542%) 
Windows all                  :    65527 ( 67.782%) 
Linux all                    :     2589 (  2.678%) 
Linux on ARM embedded/mobile :       10 
Linux   64 Bit Matlab/Octave :     1691 ( 65.315% of all Linux systems) 
Windows 64 Bit Matlab/Octave :    35868 ( 54.738% of all Windows systems) 
MacOS-X 64 Bit Matlab/Octave :    19906 ( 69.701% of all MacOS-X systems) 
(*) Strong underestimate for Linux, overestimate for Windows and OSX!
For Macintosh - Breakdown by system architecture:
PowerMac                     : 1446 (  5.063% of all Apple systems) 
IntelMac                     : 27113
For Macintosh - Breakdown by OS/X version:
10.3  - Panther               : 156
10.4  - Tiger                 : 1864
10.5  - Leopard               : 3010
10.6  - Snow Leopard          : 3958
10.7  - Lion                  : 1942
10.8  - Mountain Lion         : 2207
10.9  - Mavericks             : 3128
10.10 - Yosemite              : 3895
10.11 - El Capitan            : 3670
10.12 - Sierra                : 3524
10.13 - High Sierra           : 1185
For MS-Windows - Breakdown by Windows version:
Windows additional preVistas : 1116
Windows 2000                 : 145
Windows XP                   : 14174
Windows Vista                : 2661
Windows 7                    : 31109
Windows 8                    : 6017
Windows 8.1                  : 154
Windows 10                   : 10149
For MS-Windows - Breakdown by Matlab release:
Matlab R2007a (V7.4) or later: 59965
Previous Matlab releases     : 5176
Breakdown for all systems by Matlab major versions:
Matlab 5.x                   : 1
Matlab 6.x                   : 524
Matlab 7.x                   : 42732
Matlab 7.0   (R2005a)        : 2172
Matlab 7.1   (R2005b)        : 1320
Matlab 7.2   (R2006a)        : 875
Matlab 7.3   (R2006b)        : 1133
Matlab 7.4   (R2007a)        : 3110
Matlab 7.5   (R2007b)        : 4245
Matlab 7.6   (R2008a)        : 2795
Matlab 7.7   (R2008b)        : 2117
Matlab 7.8   (R2009a)        : 3199
Matlab 7.9   (R2009b)        : 3366
Matlab 7.10  (R2010a)        : 5941
Matlab 7.11  (R2010b)        : 2522
Matlab 7.12  (R2011a)        : 2801
Matlab 7.13  (R2011b)        : 2499
Matlab 7.14  (R2012a)        : 4637
Matlab 8.0   (R2012b)        : 4269
Matlab 8.1   (R2013a)        : 5632
Matlab 8.2   (R2013b)        : 3102
Matlab 8.3   (R2014a)        : 5616
Matlab 8.4   (R2014b)        : 4618
Matlab 8.5   (R2015a)        : 5411
Matlab 8.6   (R2015b)        : 5212
Matlab 9.0   (R2016a)        : 4904
Matlab 9.1   (R2016b)        : 4835
Matlab 9.2   (R2017a)        : 4699
Matlab 9.3   (R2017b)        : 3317
Matlab 9.4   (R2018a)        : 357
Number of GNU/Octave V3+ installations by system:
Octave on OS/X               :      648 (  2.269% of all OS/X installs) 
Octave on Linux              :      411 ( 15.875% of all Linux installs) 
Octave all on Windows        :      386 (  0.589% of all Windows installs) 
Octave 4 on Windows          :      223 (  0.340% of all Windows installs) 
Parsed lines in registration log        : 262439
Invalid (skipped) log entries           : 0