Lisa's First Word promotion due to the 1984 Summer Olympics boycott by the Soviet Union, as happened to Krusty. At one point in the episode, Dr. Hibbert refers to Olympic gymnastic medalist Mary Lou Retton. In its original American broadcast, "Lisa's First Word" was watched by 28.6 million viewers, the most-watched episode of the season. It finished thirteenth in the ratings for the week of November 30 to December 6, 1992, with a Nielsen rating of 16.6. The episode was the highest-rated show on Fox that week. It acquired the highest national Nielsen rating of the show since the season two episode "Bart
Liquid apogee engine for a range of other manoeuvres, such as end-of-life deorbit, Earth orbit escape, planetary orbit insertion and planetary descent/ascent. In some parts of the space industry an LAE is also referred to as a liquid apogee motor (LAM), a liquid apogee thruster (LAT) and, depending on the propellant, a dual-mode liquid apogee thruster (DMLAT). Despite the ambiguity with respect to the use of "engine" and "motor" in these names, all use liquid propellant. An apogee kick motor (AKM) or apogee boost motor (ABM) such as the Waxwing, however, uses solid propellant. These solid-propellant versions are not used on new-generation satellites.