THINK is the one-word corporate slogan most closely associated with IBM.
Thomas J. Watson introduced the slogan in 1911 while working at the National Cash Register Company. He later brought it to the Computing-Tabulating-Recording Company, whose businesses eventually became International Business Machines, or IBM. The word appeared on signs, publications, promotional materials, and employee communications.
IBM treated THINK as more than an advertising line: it represented a culture of disciplined problem-solving and thoughtful business conduct. The company later used the idea in product names such as ThinkPad, ThinkCentre, and ThinkVision, as well as its IBM Think conference.
Apple’s “Think different,” introduced in 1997, is often discussed alongside IBM’s THINK and is widely viewed as a response to the older slogan. That similarity can make Apple seem like the answer, but the one-word THINK identity belongs to IBM. Xerox and Intel have had memorable slogans, yet neither is the canonical match for this question.