RDS is Macromedia's Remote Development Services - if you have Dreamweaver or Homesite installed, you'll have RDS installed. Remote Development Services (RDS) lets you access a remote ColdFusion MX server using HTTP. Using RDS, IDE users can securely access remote files and data sources, build SQL queries from these data sources, and debug CFML code.
Also, please use a more descriptive thread title
Jamie.