In 2000, Internet Explorer was released for Mac, which was the first browser that fully supported HTML 4.01 and CSS 1. It was also the first browser to fully support the PNG image format. By 2001, after a campaign by Microsoft to popularize Internet Explorer, Internet Explorer had reached 96% of web browser usage share, which signified the end of the first browsers wars as Internet Explorer had no real competition. Since the start of the 21st century the web has become more and more integrated into peoples lives. As this has happened the technology of the web has also moved on. There have also been significant changes in the way people use and access the web, and this has changed how sites are designed. Since the end of the browsers wars new browsers have been released. Many of these are open source meaning that they tend to have faster development and are more supportive of new standards. The new options are considered by many to be better than Microsoft's Internet Explorer. The W3C has released new standards for HTML (HTML5) and CSS (CSS3), as well as new JavaScript API's, each as a new but individual standard. While the term HTML5 is only used to refer to the new version of HTML and "some" of the JavaScript API's, it has become common to use it to refer to the entire suite of new standards (HTML5, CSS3 and JavaScript). Web designers use a variety of different tools depending on what part of the production process they are involved in. These tools are updated over time by newer standards and software but the principles behind them remain the same. Web designers use both vector and raster graphics editors to create web-formatted imagery or design prototypes. Technologies used to create websites include W3C standards like HTML and CSS, which can be hand-coded or generated by WYSIWYG editing software. Other tools web designers might use include mark up validators and other testing tools for usability and accessibility to ensure their websites meet web accessibility guidelines. Marketing and communication design on a website may identify what works for its target market. This can be an age group or particular strand of culture; thus the designer may understand the trends of its audience. Designers may also understand the type of website they are designing, meaning, for example, that (B2B) business-to-business website design considerations might differ greatly from a consumer targeted website such as a retail or entertainment website. Careful consideration might be made to ensure that the aesthetics or overall design of a site do not clash with the clarity and accuracy of the content or the ease of web navigation, especially on a B2B website.