NW programs emphasize an observe-and-report strategy for preventing crime in communities. Existing research suggests that NW has some positive effects in preventing crime, particularly residential burglary. Most NW programs are initiated by police, residents learn about NW through newsletters and community meetings, and groups tend to be predominantly white and disproportionately upper class. Most programs included community-oriented activities and other crime prevention measures (e.g., property identification, home security surveys) in addition to informal surveillance. Receptivity and level of involvement varied among NW programs. Of the 550 programs, 66 involved patrols. These tended to have more formalized structures and specialized needs than general NW programs. A major program concern was maintaining resident participation. Successful programs tended to be flexible, have formal standards, are tailored to the community, and combine other activities with surveillance. 2 tables and 24 references. For full report, see NCJ 108618.