such as a photodiode array or other photodetector devices as is known in the art the light sensor generates color data signals representative of the light reflected from the object under test it will be appreciated as is known in the art that the color data signals may be processed according to the functions of the color measuring device for example the color data signals may be communicated as raw electronic impulses may be converted to reflectance data that for example corresponds to the amount of reflection wavelength by wavelength for the measured light or may be converted into lab or xyz terms other components of the color measuring device 10 as is known in the art include a charger printed circuit board 50 a flash capacitor 55 a connector 60 for external power and communications cable e g rs232 and a removable battery 65 other components not shown include a serial port for external communication of data with further reference to fig1 a the housing 15 includes a mounting surface 100 to which an independently operable processing device 105 hereinafter u201c iopd u201d can be mounted and attached the mounting surface 100 forms part of the housing or can be pivotally attached or hinged to the housing 15 such that the iopd can be selectively positioned at different angles relative to the housing once it is mounted the iopd 105 is a stand alone general purpose computing device.