Minimalistic microsoft windows 7 logo on a blue backgroundMinimalistic microsoft windows 7 logo on a blue background
A blue building in squares with the windows 7 logoA blue building in squares with the windows 7 logo
The windows seven logo on a blue shining backgroundThe Windows Seven logo on a blue shining background
Radio telescopes and antennas on a background of blue radianceRadio telescopes and antennas on a background of blue radiance