APÂ®, Advanced Placement ProgramÂ® or Pre-APÂ® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product. SATÂ® is a trademark registered and/or owned by the College Board, which was not involved in the production of, and does not endorse, this product.
1 The International Society for the Study of Individual Differences (ISSID) was founded in 1983 to foster research on individual differences in temperament, intelligence, attitudes, and abilities.
A unique device identifier (UDID) is a 40-character string assigned to certain Apple devices including the iPhone, iPad, and iPod Touch. Each UDID character is a numeral or a letter of the alphabet. Using the UDID, third parties, particularly app vendors, can track subscriber behavior. These companies can learn what the user likes, and then tailor advertising accordingly. Unfortunately, this UDID feature carries the potential for abuse.