"Now 157 years old, Corning (NYSE: GLW) has come from window making to sit at the forefront of two of the fastest-growing segments of the technology space: flat panel TVs and fiber-optic," says tech expert Mark Mowrey.

In The Prudent Speculator TechValue Report, the advisor explains his bullishness on Corning, which has shown a "long-time commitment to future-focused research and development."

"For both its TV and fiber optics markets, the company supplies glass. We're not talking dinnerware, though. Rather, the company is the leader in selling flat panel display glass and fiber-optic cabling. is testament to

"In addition Corning maintains an Environmental Technologies business, which develops emissions and pollution control products, and a Life Sciences business, where the company makes lab glass and drug testing products.

"For the past three quarters, revenue has been growing at a double-digit pace overall, hitting $1.58 billion in the final quarter of last year, as both the Display Technologies and Telecommunications businesses made up for relative weakness in Environmental Technologies.

"Yet, the stock's forward earnings multiple has trended steadily downward, we suppose, as fears increase that both those markets eventually will prove less profitable as competition increases. On the contrary, we think end-market growth will hasten, while Corning's technological lead expands.

Last December, over 100 stocks were featured in our Top Picks for 2007 report. Now, at mid-year, we turn to the 20 advisors whose picks showed the strongest gains to get an update on their previous picks, as well as a new favorite stock for the second half of the year.

Mark Mowrey, editor of the Prudent Speculator TechValue Report, chose Cogent Inc. (NASDAQ: COGT), which rose 41% as of June 1, 2007. Although he maintains a $24 price target for those who own the stock, he no longer is recommending purchase.

For his new top idea, Mark looks at United Online Inc. (NASDAQ: UNTD). The advisor explains, "For as many reasons to be wary of the company, we find more to like about this net-centric company.

"Founded as Juno Online Services in May 1995, and formed via the merger of that company with fellow dial-up Internet services provider NetZero in June 2001, United Online is one of a select few surviving early Net access players.

"As UNTD milks the dial-up business for cash flow, management hopes to transition as many of those paying customers as they can to a new broadband offering. Still, revenue from the communications segment is declining at a rapid clip, falling 13 percent in 2006 to $375.9 million.

"So what is there to like about a company with declining revenue in its core business, the only savior for which is entry into an even more competitive space? The general answer is the provision of services folks utilize once they're already on the Net.

Each year Steven Halpern, editor of TheStockAdvisors.com, surveys the leading financial newsletter advisors asking for their favorite stocks for the coming year. This article is part of his 24th annual Top Picks Report.

Cogent Inc. (NASDAQ: COGT) is a top speculative idea from Mark Mowrey, editor of the Prudent Speculator TechValue Report. He explains, "Cogent's identification technology emphasizes the uniqueness of the human fingerprint as the best method for identifying its owner.

"Other potentially more reliable technologies exist, such as retinal, facial, voice, and vascular identification, but none has proved as long-term successful in the field as fingerprint matching. Applications include the obvious, like law enforcement and access restriction, and the not so obvious, such as laptop security and fingerprint-based payment systems.

"Revenue peaked in 2005, the bulk coming from two primary customers: the U.S. Department of Homeland Security and the National Electoral Council of Venezuela. Work continues with both agencies, but orders have become less predictable.