While directing the U.S. Naval Ordnance Materials Handling Laboratory at the Hingham Naval Ammunition Depot,
Hingham, Massachusetts during World War II, Cahners started a newsletter called
The Palletizer, taking its name from the
pallet, then a relatively new technology used to move goods on and off ships and around bases. Cahners was an important technical contributor to the nascent field of
materials handling, inventing and patenting a 'four-way pallet' which became the military and later industry standard. The magazine gave contractors advice on how to ship goods for the Navy using the new pallet and forklift system. The Navy let Cahners and his adjunct Saul Goldweitz (who became his lifelong business partner) take both the laboratory and the magazine private after the war and it became
Modern Materials Handling. Cahners began acquiring other magazines in 1956, starting with
Metalworking, and launching still others. Abandoning his first career in materials handling, he became one of the pioneers of 'niche-publishing', founding journals to appeal to specific business audiences and loading them with information and advertising. Cahners Publishing had grown to 90 magazine titles by the time of Cahners' death, the best-known being
Variety and
Publishers Weekly. The company was headquartered in the Boston suburb of Newton. The first Cahners magazine,
Modern Materials Handling, is still published today by Peerless Media, a B2B media company located in Framingham, MA. ==Philanthropy==