According to comScore, Google finished September with 66.7 percent of the search engine market share, up from 66.4 percent in August. Bing finished second with 15.9 percent, unchanged from its mark in August. Meanwhile, Yahoo saw its search share finish at 12.2 percent, down from 12.8 percent in the prior month, its lowest share in memory, according to Search Engine Land. Ask claimed 3.5 percent of the market in September, up from 3.2 percent in August; AOL finished with 1.8 percent, up from 1.7 percent. Year-over-year, Yahoo is the only one of the five major search engines to have lost market share. (Search Engine Land)