Megan Squire is a professor of computing sciences at Elon University. Her primary research interest is in collecting, cleaning, and analyzing data about how free and open source software is made. She is one of the leaders of the FLOSSmole.org, FLOSSdata.org, and FLOSSpapers.org projects.

• Table of Contents"Why Do You Need Clean Data?""The Fundamentals: Types Encoding and Formats""Workhorses of Clean Data: Text Editors and Spreadsheets""Speaking the Lingua Franca: Data Conversion -""Collecting and Cleaning Data from the Web""Cleaning Data Stored in PDFs""Cleaning Data in RDBMS"Best Practices for Sharing Your Clean Data"Stack Overflow Project""Twitter Project"