Tech stalwarts like Intel and Microsoft produced respectable gains last year, but Apple more than doubled in share price and R.I.M. nearly tripled. Google kicked in with an advance of 50 percent. Many portfolio managers who could claim these three among their top five or six holdings were able to double their average returns. At the TA Idex Transamerica Science & Technology fund, Apple, Google and R.I.M. made up more than 18 percent of the portfolio in early December, up from 16.2 percent Sept. 30. The fund, whose lead manager is Kirk J. Kim, returned 32 percent. With large stakes in the same three companies, the Old Mutual Columbus Circle Technology & Communications fund also returned 32 percent. The Turner New Enterprise fund returned 30 percent.