1. A computer-implemented process for computer conferencing, comprising the steps of: (a) displaying, to a user of a caller, a directory of possible callees for a computer conference call, wherein: the user selects a callee from the directory of possible callees; and the caller and the selected callee are nodes of a computer network; and (b) initiating the computer conference call from the caller to the selected callee, wherein: the directory of possible callees comprises a first subdirectory of possible callees and a second subdirectory of possible callees different from the first subdirectory; and the directory is an alphabetized combination of the first and second subdirectories.