O/R デザイナー(A tool that provides a visual design surface for creating LINQ to SQL entity classes and associations (relationships) based on objects in a database. The Object Relational Designer also provides functionality to map stored procedures and functions to System.Data.Linq.DataContext methods for returning data and manipulating entity classes)
R1C1 表記法(" A convention for referencing the location of cells in a worksheet in which both the rows and the columns on the worksheet are numbered. The location of a cell is indicated with an "R" followed by a row number and a "C" followed by a column number.")
R-2 乗値(A number from 0 to 1 that reveals how closely the estimated values for the trendline correspond to your actual data. A trendline is most reliable when its R-squared value is at or near 1)