Internet Explorer 1
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Microsoft Internet Explorer 1.0 (Codenamed O'hare) first debuted on August 16, 1995 as part of the Microsoft Plus! Pack for Windows 95.
It was a reworked version of Spyglass Mosaic.
NT Equivalent
Microsoft Internet Explorer 1.0 was only shipped for Windows 95 in the Microsoft Plus! Pack. Instead, Windows NT 4.0 included Internet Explorer 2.