Patent ID: 7966569

Claim:
A method of determining data, comprising the steps of: (a) displaying a handbook on a computer display screen, said handbook including a left page, a right page, and at least one binder ring interconnecting the left page to the right page; (b) locating a page in said handbook being displayed on said computer display screen; and (c) determining said data from said page in said handbook and displayed on said computer display screen, said data determined during the determining step (c) being displayed on said computer display screen, wherein the determining said data comprises obtaining and/or calculating data; wherein the determining step (c) for determining said data from said page in said handbook being displayed on said computer display screen comprises the steps of: selecting from said page in said handbook a desired amount of salt from a particular weight of solution on said page in said handbook on the condition that said particular weight of solution is located on said page in said handbook; locating on said page in said handbook a first weight of solution associated with a first amount of salt and a second weight of solution associated with a second amount of salt, where said first weight of solution is greater than said particular weight of solution and said second weight of solution is less than said particular weight of solution; interpolating between the first and second different weights of solution to determine said desired amount of said salt having a value which lies between the first and second amounts of salt on the condition that said particular weight of solution is not located on said page in said handbook; and displaying said desired amount of said salt on said computer display screen.