The book, Essentials of Information Technology (402) for CBSE Class X, based on the Skill Subject approved by CBSE’s Department of Skill Education, aims at upgrading the skills and proficiency of the young learner in the field of Information Technology. This book has been prepared strictly according to the CBSE curriculum. The course has been divided into two parts—Employability Skills and Subject-specific Skills—details of which are as under: • Employability Skills incorporates five important skill sets, viz. Communication Skills, Self-Management Skills, ICT Skills, Entrepreneurial Skills and Green Skills. Each of these skills has been covered in detail as a separate unit as per the CBSE syllabus. • Subject-specific Skills covers advanced topics and features of OpenOffice Writer, Electronic Spreadsheet, Database Management Systems along with Web Applications and Security. It consists of four units. Unit 1 focuses on advanced concepts of Digital Documentation like Styles, Table of Contents, Templates and Mail Merge. Unit 2 comprises Electronic Spreadsheet, covering concepts of Subtotal, Data Consolidation, Working with Scenarios, Goal Seek and handling Macros along with Sharing Workbooks—Spreadsheets and Hyperlinks. Unit 3 is based on Database Concepts and their implementation while Unit 4 is about Web Applications and Security.