What are the categories of estimating software? How are they used in estimating? Question 28 options: Spreadsheet. They are used to prepare entire estimates and to augment specialized software packages. Specialized software packages. They are used to prepare entire estimates. Takeoff packages. They are used to determine the lengths, areas, and volumes of the different components in a building project. Building information models (BIM). They are used to determine the lengths, areas, and volumes of the different components in a building project