With the success of Netscape showing the importance of the web (more people were using the Internet due in part to the ease of using Netscape), Internet browsing began to be seen as a potentially profitable market. Following Netscape's lead, Microsoft started a campaign to enter the web browser software market. Like Netscape before them, Microsoft licensed the Mosaic source code from Spyglass, Inc. (which in turn licensed code from University of Illinois). Using this basic code, Microsoft created Internet Explorer (IE).