-Mackintosh Hydraulic Company
-founded by Scottish guy in 1850s in Cincinnati
-originally working on making pipes and valves and the like
-develops analyzers as part of the Analyzers boom
-based on the differential analyzer
-sells models over 1870s, including to government
-which makes it tangential to war effort in this era
-in 1880s gets order as part of the Analyzers > Grand Analyzers of the Hydraulic Era from government
-builds standard water valve for it, a bunch of them, and memory w/ wall effect
-thus becomes very important in rise of numeric analyzers
-in 1894 builds a Grand Mackintosh Analyzer as part of influential business model of timesharing
-aka "Old Mack" or "Mack I"
-businesses can send requests for programmes, and receive results by telegraph
-and company organizes team of programmers
-all women, often referred to as a "programme harem" in "purdah" doing this grunt work
-but with "important" positions of management, planning with mathematics, taken by men
-makes it leading part of analyzer industry
-despite bickering over it being a corporate clique it limbers on as one of several new cartels of the economy
-later faced with the Recessions > Panic of 1911 and the ensuing Great Depression
-causes analyzers to lose revenue as businesses reduce money they spend on it
-forces Mackintosh to make Mack II, a bigger meaner analyzer able to get more orders and compute them better
-which it promotes even more heavily
-also contracts out inventory managing analyzers for big businesses
-which is increasingly viable as water valves reduce