A company founded in 1887 by Salmon & Gluckstein tobacco company, and named after the man appointed to run the company, Joseph Nathaniel Lyons.

It was involved in a range of hotel and food related contexts, but was most familiar to the public for the Lyons tea houses and corner shops.

The company was instrumental in pioneering a range of business computers - LEO range (see

It was eventually broken up and incorporated into other companies.

One of its employees was Margaret Roberts, later Thatcher.

The Wikipedia article is at J. Lyons and Co..

Details of the archives, held in various places, here [1] and the Grace's Guide page [2].