With more and more listeners acquiring FM radios, the stakes became higher for stations to attract market share so that they could sell more advertising at a higher rate. By 1970, many of the stations were moving to institute programming rules with a "clock" and system of "rotation." With this shift, stations' formats in the early 1970s were now billed as progressive. DJs still had much input over the music they played, and the selection was deep and eclectic, ranging from folk to hard rock with other styles such as jazz fusion occasionally thrown in. 1970s In October 1971, WPLJ in New York began to shift its freeform progressive rock format into a tighter, hit-oriented rock format similar to what would later become known as AOR. WPLJ's parent company, ABC, installed similar formats on all of its FM stations, including KLOS in Los Angeles and WRIF in Detroit. In 1973, Lee Abrams, formerly at WRIF, successfully installed a similar format, later known as SuperStars, at WQDR in Raleigh, North Carolina. In 1972, Ron Jacobs, program director at KGB-FM in San Diego, began using detailed listener research and expanded playlists in shifting the Top 40 station toward a progressive rock format. Meanwhile, at competing station KPRI, program director Mike Harrison was similarly applying Top 40 concepts to the progressive format, which he dubbed "album-oriented rock." In the mid-1970s, as program directors began to put more controls over what songs were played on air, progressive stations evolved into the album-oriented rock format. Stations still played longer songs and deep album tracks (rather than just singles), but program directors and consultants took on a greater role in song selection, generally limiting airplay to just a few "focus tracks" from a particular album and concentrating on artists with a more "commercial" sound than what had been featured a few years earlier. Noted DJ "Kid Leo" Travagliante of the station WMMS in Cleveland observed the changes in a 1975 interview: "I think the '60s are ending about now. Now we are really starting the '70s. The emphasis is shifting back to entertainment instead of being 'relevant' ... In fact, I wouldn't call our station progressive radio. That's outdated. I call it radio. But I heard a good word in the trades, AOR. That's Album-Oriented Rock. That's a name for the '70s." Radio consultants Kent Burkhart and Lee Abrams had a significant impact on AOR programming.