* Use of plugins, such as [[Java applet]]s or the proprietary [[Adobe Flash]] (using [[Real-Time Messaging Protocol|RTMP]] protocol for data streaming to Flash applications). These have the advantage of working identically across all browsers with the appropriate plugin installed and need not rely on HTTP connections, but the disadvantage of requiring the plugin to be installed
* [[Google]] announced<ref>App, The. (2010-12-02) [httphttps://googleappengine.blogspot.com/2010/12/happy-holidays-from-app-engine-team-140.html Google App Engine Blog: Happy Holidays from the App Engine team - 1.4.0 SDK released]. Googleappengine.blogspot.com. Retrieved on 2014-04-12.</ref> a new Channel API for [[Google App Engine]],<ref>Paul, Ryan. (2010-12-06) [https://arstechnica.com/web/news/2010/12/app-engine-gets-streaming-api-and-longer-background-tasks.ars App Engine gets Streaming API and longer background tasks]. Ars Technica. Retrieved on 2014-04-12.</ref> implementing a Comet-like API with the help of a client JavaScript library on the browser. This API has been deprecated.<ref>{{cite web |url=https://cloud.google.com/appengine/docs/standard/java/javadoc/com/google/appengine/api/channel/package-summary |title=Package com.google.appengine.api.channel |date=2019-11-16 |access-date=2020-04-30 |quote=This API has been deprecated. }}</ref>
