E-mail has become the most common business software application and backbone of business communications. A 2013 survey found that two-thirds of respondents stated that e-mail was their favorite form of business communication, surpassing social media, telephone calls, and in-person contact. The document contrasts e-mail with social media, noting that while information exchange has increased through social networks and Web 2.0 tools, e-mail differs from social media in its maturity and stability within enterprises.