Kevin March, SVP & Chief Financial Officer
Vivek I will leave it to you to analyze the competitors. I will speak to how TI is doing. You may recall back in late ’10 and ’11 time frame, we significantly stepped up our investments in that particular segment in order to accelerate our product introductions and therefore begin to accelerate of revenue growth. And if you take a look at what’s happened over the last — Dave mentioned in his opening remarks nine quarters of sequential or continues year-over-year growth. That strategy has paid off, so those product are really beginning to take. And as you know those kind of products tend to have very long shelf lives. So we expect to see more of the same on that.
Now while we cut spending down this past year as result of the restructuring we announced this time a year ago, we did not eliminate them. The amount that we are investing is still quite high, and that is why the operating profit is still not quite where we think our entitlement will take us to. So we continue to invest at quite a healthy level, just not at the level that you saw us invest in, in the prior few years. So those combined high levels of investment — an expanding product portfolio from heavier levels of investment in the prior few years, have all given us very strong growth net segment and will continue to give us growth, and quite frankly based upon some of the best in class performance that you could look at out there, we had, shall we say, expectations similar to at least as well as those companies are operating.
Dave Pahl VP, Head of Investor Relations
And I would also add, Vivek, if you look at our product portfolio, like inside of micro-controllers, we got two architectures there where we will introduce new products with new interfaces that meet new standards inside of that. A lot of our competitors will have half a dozen or a dozen different architectures where they got to spread their R&D investments over so we can be efficient with that. And in addition, if you remember as part of the wireless restructuring, we brought over those connectivity products that really already have a pretty significant investment in those wireless technologies. So, we are supporting nearly a dozen wireless standards today and that group is really focused on growing to top-line rather than having to develop a fine technology. So that. Thanks for that question Vivek, and we will go to the next caller please.
Operator
We’ll go next with Jim Covello with Goldman Sachs
Jim Covello, Goldman Sachs
Thanks guys. Thanks so much for taking my questions congratulations on good results. A lot of great questions was asked already. My one question is just around the long-term segment goals that you might have. Auto is kind of low double-digits, personal electronic is almost 30%, although that is coming down. Is the goal really from the segment diversification standpoint that continue to increase in particular that auto-sub category and decrease the personal electronics category say over the next two or three years?
Kevin March, SVP & Chief Financial Officer
Yes, Jim, our goal is not necessarily to try to optimize that mix per se. I would say, if you look inside of personal electronic as an example, we will look for places where we can find sustainable revenue with a differentiated position. If you look at some of our largest customers that we sell products into, we’ll sell some several hundred devices into those customers and those products could be anywhere $0.75 down to a nickel. And often times they may have lives that lives from one generation of a product to another.
