Complex sentence: WorldWideWeb was the world's first Web browser and WYSIWYG HTML editor and was introduced on February 26,1991 by British scientist Sir Tim Berners-Lee and ran on the NeXTSTEP platform.
Split into simpler sentences: WorldWideWeb was the world's first Web browser and WYSIWYG HTML editor. It was introduced on February 26,1991 by British scientist Sir Tim Berners-Lee, and ran on the NeXTSTEP platform.