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The Industrial Revolution (18th and 19th century) saw the rise of banking, railroads, insurance, retailing, oil, and the telegraph industries. To transact business, an increasing large number of clerks were needed to handle order-processing, accounting, and file documents, with increasingly specialized office space required to house these activities. Most of the desks of the era were top heavy with paper storage bins extending above the desk-work area, giving the appearance of a cubical and offering the workers some degree of privacy.
The relative high price of land in the central core of cities lead to the first multi-story buildings, which were limited to about 10 stories until the use of iron and steel allowed for higher structures. The invention of the safety elevator in 1850 by Elisha Otis saw the rapid escalation upward of buildings.
• 20th Century
By 1906, the Sears, Roebuck and Co opened their mail order and headquarters operation in a 3,000,000-square-foot (280,000 m2) building in Chicago, at the time, the largest building in the world. The Time and motion study, pioneered in manufacturing by F. W. Taylor and later applied to the office environment by Frank and Lillian Gilbreth, lead to the idea that managers needed to play an active role in directing the work of subordinates. As a result, in 1915, the Equitable Life Insurance Company in New York City introduced the “Modern Efficiency Desk” with a flat top and drawers below, designed to allow managers an easy view of the workers. This led to a demand for a large square footages per floor in buildings, and a return to the open spaces that were seen in pre-industrial revolution buildings.