What is Abacus? Abacus is an ancient calculating device having its roots in Asia since ages. Abacus in today's times time is made of wood, metal or plastic rectangular frame with freely sliding 5 beads over vertical rods.
A health maintenance organization (HMO) and a preferred provider organization (PPO) have several differences such as which doctors patients can see, how much services cost, and how medical records are kept.The most significant difference between the two organizations is the option to select health care providers.n HMO requires that patients see only doctors or hospitals on their list of providers. With a PPO, patients can see any doctor they wish, usually within a preferred network of providers.
Knowing the differences between plans can help you choose the one thatâs right for your health care needs and budget. As you look at plans, you may notice that some plans are HMOs, some are PPOs, and some are EPOs, but what does that mean? HMO stands for health maintenance organization.