Rui post of April 8th is correct. The call is from the circulation dept of Laser Focus World Magazine which is a free subscription to IT professionals especially those who are involved with photonics. I suspect that got my name from another subscription, Solid State Technology WaferNews which is part of the PennWell Corporate Publishing Group.
PennWell Corporation: WaferNews is a part of PennWell Corporation's Advanced Technology Division (ATD), located in Nashua, New Hampshire. The ATD also produces specialized publications, newsletters, trade shows, seminars and other information products in international markets for communications, computer-based systems, computer graphics, electronic publishing, semiconductor technology, data storage, lasers and electro-optics, and fiber optics, including: Solid State Technology, Microlithography World, the Metrology 2000 Conference, Laser Focus World, Military & Aerospace Electronics, the CotsCon conference, Data Storage, the HeadMedia conferences, CleanRooms, the CleanRooms conferences, InfoStor, Portable Design, Industrial Laser Solutions, Lightwave, Image Processing Europe, Vision Systems Design, and Computer Graphics World. PennWell Corporation, headquartered in Tulsa, OK, publishes business-to-business publications serving the energy, power and municipal markets, in addition to the markets served by the ATD.
If you are on any of these mailing distributions lists past or present, you are probably getting a call for their subscription to one of these magazines.