NCSA Mosaic，是互联网上第一个获普遍使用，也是第一个可以同时显示文本和图片，而不是在单独的窗口中显示图片的网页浏览器。它是由美国伊利诺州的伊利诺大学的NCSA在1993年所发表。在当时人气爆发的大受欢迎。Mosaic的出现，算是点燃互联网热潮的火种之一。Mosaic经常被认为是首款的图形用户接口浏览器，但事实上WorldWideWeb、鲜为人知的Erwise和ViolaWWW都要早于Mosaic。

NCSA Mosaic, or simply Mosaic, is a discontinued early web browser. It has been credited with popularizing the World Wide Web. It was also a client for earlier protocols such as File Transfer Protocol, Network News Transfer Protocol, and gopher. The browser was named for its support of multiple internet protocols. Its intuitive interface, reliability, Windows port and simple installation all contributed to its popularity within the web, as well as on Microsoft operating systems. Mosaic was also the first browser to display images inline with text instead of displaying images in a separate window. While often described as the first graphical web browser, Mosaic was preceded by WorldWideWeb, the lesser-known Erwise and ViolaWWW.