Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications. wikipedia.org

A sale is the act of selling a product or service in return for money or other compensation. It is an act of completion of a commercial activity. wikipedia.org

Plumbing is the system of pipes and drains installed in a building for the distribution of potable drinking water and the removal of waterborne wastes, and the skilled trade of working with pipes, tubing and plumbing fixtures in such systems. wikipedia.org

A data entry clerk, sometimes called a typist, is a member of staff employed to type data into a database using a keyboard. The keyboards used can often have specialist keys and multiple colours to help them in the task and speed up the work. wikipedia.org

Business coaching is a type of personal or human resource development. It provides positive support, feedback and advice to an individual or group basis to improve their personal effectiveness in the business setting. wikipedia.org

Conflict resolution is conceptualized as the methods and processes involved in facilitating the peaceful ending of some social conflict. wikipedia.org

Direct selling is the marketing and selling of products directly to consumers away from a fixed retail location.

Building construction is the process of preparing for and forming buildings and building systems. Construction starts with planning, design, and financing and continues until the structure is ready for occupancy. wikipedia.org

Executive coaching is a type of human resource development for business leaders. It provides positive support, feedback and advice on an individual or group basis to improve personal effectiveness in the business setting. wikipedia.org