American Arithmometer Company
From St. Louis Hackerspace Wiki
The American Arithmometer Company was a company established in St. Louis in 1886 by William Seward Burroughs, grandfather of the fameous writer of the same name.
AAC manufactured business equipment, most notedly an adding machine invented by Burroughs.
According to a local historian at the Bellefontaine Cemetery, where Burroughs is buried, AAC was located in two places here in St. Louis until it moved to Detroit in 1904.
In 1890, the company was located at 509 Olive Street, which may be part of the LaSalle Building.
In 1900, the company was located at 1212 Wash Street (now Cole Street). That location is now a parking lot across the street from KDNL-TV.