1) None 2) Basic (ability to open and browse a PDF; create and save a PDF from an existing document) 3) Intermediate (ability to combine multiple PDF documents, perform a search in PDF document, manipulate PDF document pages, edit content in a PDF document and convert PDF files) 4) Advanced (ability to create PDFs from a technical document; create interactive PDF forms such as adding buttons and links; enhance PDF documents such as automate repetitive tasks). 1) None 2) Basic (ability to enter and correct data, modify a workbook, format a worksheet, and print) 3) Intermediate (ability to work with multiple worksheets, develop and edit functions to calculate values, filter and manipulate data) 4) Advanced (ability to automate some operations, manage macro commands, work with pivot tables, and create MS Excel applications).