A job search engine is a website that facilitates job hunting. These sites range from large scale generalist boards to niche markets such as engineering, legal, insurance, social work and teaching. Users can typically deposit their résumés and submit them to potential employers, while employers can post job ads and search for potential employees. A recent trend in job search engines is the emergence of vertical search, which allows job seekers to search across multiple websites. Some of these new search engines primarily index traditional job boards. These sites aim to provide a "one-stop shop" for job seekers who do not need to search the underlying job boards. Other job search engines index pages only from employers' websites, choosing to bypass the traditional job boards entirely. Vertical search engines allow job seekers to find positions not advertised on the traditional job boards. There is a close relationship between these search engines and the emergence of XML based standards in the recruitment industry. Vertical search is an emerging market with several new startups in this space both in US and in other countries.