Simplify the following text for a Grade 7 native English-speaking person.
Original: It is also rumored that PAM actually stood for `` Personal Arcade Machine '' , as the majority of games for the system ended up being arcade conversions .
Simplified: A rumor said that `` Pam '' or `` PAM '' actually stood for `` Personal Arcade Machine . '' This was because most games for the system were based on existing arcade games .