OA is eager to learn, and ERP is very professional and complicated. Relatively speaking, OA only has several functions, such as information, communication, announcement, attendance, administration and manpower, which are learned module by module. There are still some differences in OA functions among domestic families, but they are all similar, and learning one is basically the same. I specialize in OA. If you don't understand, ask me again and leave you a phone number if necessary.