Infonautics, the developer of the online Electric Library service used by many libraries and schools, has sold its cornerstone product to Bell & Howell. A new, as yet unnamed, joint-venture company will be formed to market not only Electric Library, but also Bell & Howell's ProQuest K-12 business. Taken together, ProQuest and Electric Library are used in more than 40,000 libraries and schools. It is estimated that 25 million students in K-12 used the two products each day. Infonautics will own 27 percent of the joint-venture company. It will continue to market the consumer version of Electric Library, and will retain its line of "Sleuth" online reference services.