The Wayback Machine - https://web.archive.org/web/20160705235643/https://twittercommunity.com/

Announcements

Announcements about the Twitter Platform, usually pertaining to specific technical changes and advisories such as minor feature deprecations, SSL certificate changes, and bug fixes.

News and Events

This category is for announcements, news items, and discussions about events that the <a href="http://twitter.com/twitterdev">@TwitterDev</a> (Developer and Platform Relations) team are attending.

REST API

The <strong>REST API</strong> allows you to create apps that take advantage of integration with Twitter features such as user profiles, tweets, timelines, and search. This is the place for developers to discuss and ask questions related to REST API features.

Cards

Twitter Cards help you richly represent your content within Tweets across the web and mobile. This gives users greater context for shared URLs and can provide greater traffic to your site or app.

Websites

This category is for discussion of Twitter widgets and buttons for your website. Embedded Tweet, embedded timeline, embedded grid, embedded Moment, Tweet button, follow button, widgets.js, and web intents.

Developer Teatime

Discuss anything and everything code-related, that is not covered by other categories. Meet new friends, collaborate on ideas, announce your newest project or library, and get to know other Twitter developers.

Advertiser API

The Twitter Ads API gives developers a way to programmatically integrate Twitter advertising data in their product. This is the place for developers to ask questions related to the Advertiser API.

Media APIs

The <a href="https://dev.twitter.com/rest/media">Media APIs</a> include photo and video uploads via Twitter's REST endpoints. Issues that are specific to Media often cross both REST and Advertiser APIs. Use this category to discuss anything related to the media endpoints.
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