Microsoft's history of stock splits and impressive growth has made one IPO share worth six figures today.Microsoft (MSFT 1.07%) is one of the stocks you probably wish you had scooped up at its initial public offering (IPO). The tech giant debuted as a public company on the Nasdaq at $21 per share on March 13, 1986, and now the price is 19x higher, closing at$399.61 on Aug. 6. Even if you didn't catch Microsoft at its two-figure price tag, its stock has had some enviable price appreciation over the last 10 ...