P Event Related Potential (P ERP) is a neurophysiological signal that provides valuable insights into cognitive processes. Synonyms for this term include P300, P3, P3b, or P3a. These designations highlight different components of the P ERP waveform. P300 is typically associated with cognitive tasks requiring attention and memory processes. P3b refers to the positive peak observed during target recognition, while P3a usually relates to the positive response found in oddball paradigms. Regardless of the label used, P ERP helps researchers investigate various cognitive functions, such as stimulus evaluation, decision-making, and working memory. Understanding these synonyms enhances our comprehension and facilitates effective communication in the field of neuroscience.