Filed under: Laptops, Tablet PCsIf you were looking for any reason whatsoever to hop into a celebratory mood, why not join IBM (or would it be Lenovo these days?) in celebrating the 15th birthday of the ThinkPad. Of course, tech historians are likely to bicker over the ThinkPad's true day of emergence, but reportedly, the IBM 2521 (later renamed the 700T) ThinkPad holds the honors of being the first of its kind to ship in July of 1992. Interesti
