LDS = Latter Day Saints, or the Mormons, who keep extensive genealogical records for their own religious purposes. Inside a mountain vault, they have assembled the single largest collection of genealogical records in the world. Thankfully, they share -- the information is available on microfilm in their family research centers. One of the standard family group sheet forms that genealogists use is refered to as "LDS" because it is the official form used by them. --Margo