With instability in the financial markets and signs of an economic slowdown, tech stocks have come under pressure. Yet in the case of design-software maker Autodesk (NASDAQ:ADSK), it still looks like boom times.

In the third quarter, revenue increased 18% to $538.4 million, and earnings came to $84.8 million, or $0.35 per share -- up 46%. Autodesk also generated $161 million in operating cash flow in Q3. There was strength across nearly all areas, especially in emerging markets like China, India, Russia, and Eastern Europe.

The company is undergoing a major transition in its design software, going from 2-D to 3-D. This makes it much easier for architects and engineers to create new structures in terms of speed, quality, and cost-effectiveness. Autodesk technologies are key in competing against tough rivals like Siemens (NYSE:SI), Parametric Technology (NASDAQ:PMTC), and Dassault Systemes (NASDAQ:DASTY).

Autodesk is also getting traction with its acquisitions, such as the NavisWorks deal. The transaction helped boost the company's 3-D products 32% to $130 million in Q3. According to the conference call, Autodesk plans more tuck-in acquisitions. And with more than $800 million in the bank, there is enough firepower for deal-making.

No doubt Autodesk has built a globally diversified footprint. Less than 35% of revenue comes from the U.S., and the company has products for verticals such as building, manufacturing, infrastructure, and media. Customers range from small companies to Fortune 100 biggies.

What's more, as emerging markets continue to build their infrastructures, there will be a need for Autodesk's software offerings. For Foolish investors seeking a tech stock for the long haul, this one is worth considering.

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Fool contributor Tom Taulli, author of The Complete M&A Handbook, does not own shares mentioned in this article. He is currently ranked 7,130 out of more than 74,000 players in Motley Fool CAPS. The Fool has a disclosure policy.