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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