<p>We collect:</p> <p><strong>Identity Data</strong></p> <p>We collect information such as your username, password, email address, IP address (collected at each site visit). This information is also used to identify individual users to the Public Network and to award activities and attribute them to you. Your username and additional content you provide, including your profile picture, question and answer content, and your reputation, are visible publicly. We or our community moderators may delete a question, an answer, a comment, or all of them and after deletion such information is only available to certain community members or Stack employees.</p> <p><strong>Contact Data</strong>: including delivery address, email address, and telephone numbers for operational purposes, including providing Services and Products.</p> <p><strong>Technical Data</strong>: including internet protocol (IP) address, your login data, traffic data, browser type and version, time zone setting and location, browser plug-in types and versions, operating system, and platform and other communication data which gives us information about how you accessed our website. Other account information and usage information including your IP address and browser data may be used for diagnosis, security, and Product and Service optimization.</p> <p><strong>Account registration information</strong></p> <p>When you register for a Stack Overflow account, we collect your name and email address, your username and any additional information you provide. We will generate a unique identification number that we will use to recognize you when you are signed in. We need to collect your personal information for account registration purposes. Although the Network provides for anonymous and pseudonymous participation, in some instances in order to use certain Products or Services, we require account registration. This requires a name associated with your account, an email address at which we can contact you, and in some cases, additional information, including a contact address, a billing address, and a password to help secure your personal information.</p> <p><strong>Billing information</strong></p> <p>For Products and Services requiring payment, we collect a billing name, phone number, and email address. We also collect a billing and shipping address for invoicing purposes.