1. A method for single-sign on of a user on a client machine to one or more target applications on target application servers in a computer information-processing network, comprising: accessing an access server from said client machine; entering user-specific access server logon credentials for logon and access to said access server; selecting a target application; presenting to said target application by said access server, previously stored user-specific target application logon credentials for logon and access to said target application in a form and according to a protocol recognizable by said target application and thereby logging into said target application on behalf of the user and establishing a target application session; sending from said access server to said client machine, information for establishing a connection from said client machine to said target application; and establishing a target application session, bypassing said access server, between said client machine and said target application.