Larry met Sergey in the summer of 1995, before he had decided to accept Stanford's offer of admission. The two met on the streets of San Francisco. Sergey was a second-year student known to be gregarious, and had signed up to be a student guide of sorts- his role that day was to show a group of first-years around the City by the Bay. Larry happened to be in his group, and his first impression of Sergey was that he was very obnoxious and that he had very strong opinions, which didn't appeal to Larry. As the tour went on, the two bickered and argued incessantly, debating the value of various approaches to urban planning, among other things. Even though they weren't sure if they necessarily liked each other yet, they were drawn together, and soon after, Larry accepted the offer from Stanford. Google got started in January of 1996 as a research project by the two. At the time, while conventional search engines ranked results by counting how many times the search terms appeared on the page, both Larry and Sergey theorized about a better system that analyzed the relationships between websites, and they called this new technology "PageRank", where a website's relevance was determined by the number of pages, and the importance of those pages, that linked back to the original site. The two originally nicknamed their new search engine, "Back Rub", because the system also checked backlinks (which are incoming links, inbound links, inlinks, and inward links) to estimate the importance of the site.