I grew up in an “IBM Town” in the Mid-Hudson Valley. Back then, everyone knew IBM, their trademark, brands, and products. IBM made the super-computers that sent men to the moon, mainframe computers the powered businesses, desk-top pc’s, laptop pc’s, electric typewriters, and software. It was the largest corporation in the world, with lot’s of cash on hand, and many employees became quite wealthy buying IBM stock at insider prices and then watching the shares split year after year, while paying a handsome dividend.
Thirty years later, most people born after Generation X never heard of IBM, and if they do recognize the name, they have no idea what IBM does.
And they tried to recapture the PC market with the PS/2?
They finally succeeded with the Thinkpad, which they later sold to China's Lenovo corp.
To highlight your comment, I worked for IBM and tried to deposit my check at my bank. The teller did not know who “International Business Machines” (name on the check) was and did not want to deposit it until a manager stepped in.