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.
PPO vs HSA. My husband's employer no longer will offer HMO's for their employees next year. We have been with our HMO for 7 yrs. He has to choose between a PPO or HSA (health savings acct).hen you are on an HMO, they have to take the HMO rate to work with the hospital, PCP, etc. This is true for the HSA, too. If a $500 hit won't destroy your bank balance (and assuming its cheaper) I would go with the HSA. If you need copays, go with the PPO.