It's an acronym of sorts: the OSCillator-based Associative Recall (OSCAR) model of serial-order and phonological production (Brown et al. 2000; Vousden et al. 2000). In other words, it's an oscillator-based model of the sequencing of phonemes in speech production.
Originally Posted by jargon_dudette
OSCAR works by associating item vectors (phoneme representations) and phonological context vectors (PCVs) in a Hebbian associative memory. The PCVs are inspired by oscillating signals in the brain, and have an important hierarchical self-similarity pattern, described below. As the PCVs are iteratively presented to the associative memory, the original item vectors are recalled and become available for production. The self-similarity pattern generated by the oscillators, when combined with noise, generates patterns of errors that previously required the use of syllable frames.
In OSCAR, there are 30 oscillators in two ... Read more here