Although this book has been primarily written on the basis of the syllabus of a paper entitled, “ Computer Systems and Data Analysis”, meant for the students appearing in non-diploma stream under section ‘A’ examination of the Institution of Engineers (India), proper care has been taken in dealing with the various topics of this book to fulfill the following objectives. The course material is up-to-date, as far a practicable. In dealing with the subject material suitable examples have been used wherever possible, for better clarity of the underlying concepts. Various types of questions, both non-numerical and numerical, have been provided at the end of each chapter. This will help the students to get themselves prepared for appearing in various examinations. Table of Contents Part I: Digital Computer Principles: Introduction to Computers Number Systems Logic Operations Digital Circuits Organisation of Digital Computers Arithmetic Logic Unit Storage Unit Control Unit References Part II: Computer Programming: Algorithms and Flowcharts Introductory concepts of Fortran programming Datatypes in Fortran Sequential Program Structures Selective program Structures Repetitive program Structures Subscripted Variables Subprograms Format Directed Input Output Operations Reference Part III: Numerical Analysis: Introduction to Numerical Analysis The Solution of Nonlinear Equations Subscripted Variables Subprograms Format Directed Input Output Operations Reference Part IV: Numerical Analysis: Introduction to Numerical Analysis The Solution of Nonlinear Equations Roots of Simultaneous Equations Eigenvalues and Eigenvectors Interpolation Numerical Differentiation and Integration Numerical Solution of Ordinary Differential Equations References index