The alternative was continually swapping the program and the data disks in Drive A. I purchased one with two 5.25 floppy disk drives this streamlined the process with the program software in the Drive A and the data in Drive B. This was a major decision because a 64K Apple IIe was $5000 – and, in 1983 $5000 was real money. So, I styled my chart of accounts after the 5 digit Uniform Construction Index (UCI) developed by the Construction Specifications Institute (CSI) and all estimating was accomplished by pen, paper and calculator. This was before the days of the desktop computer and most everything was done by hand. Soon, I discovered a need for a uniform accounting system to keep accounting and estimation on the same plane to track the accuracy of the estimation and to keep projects in line and on target. In 1975, I went into business for myself building and remodeling residential buildings. Before I get into the changes in this document over the previous, let me give you a brief outline of the evolution of it. This spreadsheet is a revision of the previous worksheet for residential and light commercial construction take-offs and project estimation used by my previous companies and which many readers of this article have and may be using today, with my permission.
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