transferree and age out.
Eventually, every green card needs to be given post interview. However, for most employment based cases, this interview requirement is waived. However, a transferee case is what got transferred to a local office for an interview. Usually transferred case would mean a very much longer delay .. it sucks. Lately the transferee percentage has skyrocketed by almost 800%. Yea it sucks.
Ageout is related to family based. Say you are the father of a 17 year old son. The rule/law dictates that kids below 18 (or 21?) years of age can be sponsored for GC. Now you filed for his app when he was 17, but frickin' INS took so long that the kid is no 58 years old with kids of hiw own .. .. well not that bad .. .
Age out cases are what INS expedites so the kid doesn't cross 18 (or 21?) age.