The following are summarizations of the contents of each of the audio segments included in this distribution. The participant names are aliases, corresponding to the speaker identifications within the transcripts. sbc015 "Deadly Diseases" A conversation among three friends, recorded in Los Angeles. Ken and Joanne are a couple, and Lenore is a friend of theirs. sbc016 "Tapedeck" A sales encounter, recorded in an audio store in Santa Barbara. Tammy (a university professor) is planning to buy a new tape deck. Brad, a salesman at the audio store, is discussing various tape decks which he is trying to sell her. sbc017 "Wonderful Abstract Notions" A conversation between two male friends, recorded in Southern California. sbc018 "Vet Morning" A task-related interaction recorded in a veterinarian office near Madison, WI. All five participants work in the office, some as secretaries and assistants and some as veterinarians. sbc019 "Doesn't Work in this Household" A family conversation, recorded in Michigan. Frank and Jan (a married couple) are talking with Ron--Jan's brother who is visiting from California. Brett and Melissa are Frank and Jan's junior-high-age children, who are doing homework and also taking part in the conversation. sbc020 "God's Love" A segment from a sermon/lecture recorded at a small conference near Chicago. The speaker is a pastor in his mid seventies. sbc021 "Fear" A segment from a rather lively sermon recorded in Boston, MA. sbc022 "Runway Heading" Task-related interaction, recorded in an air traffic control tower in Portland, OR. Lance is training to be an air traffic controller, and has just finished working a shift. Randy, an experienced controller, is giving Lance feedback/briefing on his performance on that shift. sbc023 "Howard's End" A segment from a book discussion group, recorded in Topeka, KS. The eleven participants are all women between the ages of 46 and 85. sbc024 "Risk" This segment consists of game-playing and game-teaching on a computer, and was recorded near Cape Cod, MA. Jennifer and Dan are a couple in their early twenties. sbc025 "The Egg which Luther Hatched" This is a segment from a lecture on the history and theology of Martin Luther, part of an evening class held at a church, recorded in Delaware. sbc026 "Hundred Million Dollars" This is a city meeting, recorded in Chicago. City officials interact with the public about a government grant which is being applied for, to fund community development. The city can only apply once, so are soliciting applications from various organizations and will submit the one they judge as best. sbc027 "Atoms Hanging Out" Science lecture/entertainment, recorded at a museum in Chicago. sbc028 "Hey Cutie Pie" A very intimate telephone conversation between a romantic couple in their early twenties. sbc029 "Ancient Furnace" This is a service encounter recorded in Northern California. Seth works installing heating and air conditioning units, and is at Larry's home to give him an estimate on installation. sbc030 "Vision" A segment from a sermon, recorded at a large Baptist church in Chicago.