Seattle-based Impinj said today it has expanded its system for tagging objects using RFID, or radio frequency identification. There is increased demand for this technology in the retail supply chain and in other markets, and the new system could be used for tracking pharmaceuticals, clothing, CDs, DVDs and other products, Impinj said.

The company says its enhanced system, called GrandPrix, can work on products that have been difficult to tag in the past, such as metals, liquids and stackable items like CDs.

See this story for more details about Impinj and the $26.5 million funding round it announced in December. To date, Impinj has raised $75 million.

RFID's potential is clearly growing as more companies adopt the technology for a variety of uses. Boeing is demanding that its suppliers use RFID tags, and credit card companies are rolling out systems for consumer use.

The privacy and security issues are still worrying some people, however.