This Open icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,500 icons, all in the same style and quality.
The open folder icon for pc. Manila folder that's slightly open, where files are stored. The tab is at the top left in this variant. This is what people double click to get to their information on computers.