PSINet


            _A_d_d_r_e_s_s:
            Performance Systems International
            11800 Sunrise Valley Drive - Suite 1100
            Reston, VA 22091

            _E_m_a_i_l: info@psi.com

            _P_h_o_n_e:
                 1-800-82PSI82
                 +1 (703) 620-6651
                 Fax:  +1 (703) 620-4586

            _D_e_s_c_r_i_p_t_i_o_n

            PSINet is a US-based commercial,  national  TCP/IP  and  OSI
            internetwork  available throughout the continental US and in
            Canada, Germany, and Israel, with a wide  spectrum  of  ser-
            vices  for  the  individual and corporate user of electronic
            information.  PSINet is currently  a  T1-based  network  co-
            located in telephone company facilities;  it consists of two
            hundred  organizational  networks.   The  PSINet  operations
            center,  located in Albany, NY, operates twenty-four hours a
            day, seven days a week. (A regional  office  is  located  in
            Santa  Clara, California.) Local phone numbers through PSI's
            Individual Dialup Service (IDS) provides free  telnet/rlogin
            access  to any PSINet dedicated data line (SCS and CCS) cus-
            tomer sites in nearly forty cities throughout the US.

            TCP/IP packet access is also  provided  on  a  dialup  basis
            using  V.32  modems  in more than twenty-five cities.  Three
            times a year a PSINet users group (PSITech) meets to discuss
            new  services,  new  technologies,  and operational require-
            ments.

            PSINet provides internetworking  services  to  the  NYSERNet
            user  community,  and  also has connections to the NSFNET in
            Ithaca, NY.


            _________________________
            The information in this section is provided  in  accor-
            dance  with the copyright notice appearing at the front
            of this guide.




            May 16 1991                 NNSC       Section 5.36,  Page 1








            _N_e_t_w_o_r_k _A_c_c_e_s_s

            Any IP host on the Internet may access PSINet sites.

            _W_h_o _C_a_n _U_s_e _t_h_e _R_e_s_o_u_r_c_e/_R_e_s_t_r_i_c_t_i_o_n_s

            There are no restrictions on use of PSINet for  any  purpose
            (including commercial) by its customers.  As a co-founder of
            the  Commercial  Internet  Exchange  (CIX)  with  the  other
            unrestricted-usage   commercial  providers,  this  important
            capability is being widely extended throughout the US.

            _M_i_s_c_e_l_l_a_n_e_o_u_s _I_n_f_o_r_m_a_t_i_o_n

            PSI publishes a newsletter called _T_h_e _P_S_I  _C_o_n_n_e_c_t_i_o_n.  Net-
            work  software  research  and development is done within PSI
            and is exported at no cost  or  nominal  cost  to  academic,
            government,  and nonprofit organizations.  Exported technol-
            ogy includes SNMP,  Z39.50,  and  X.500.   PSI  sponsors  an
            entry-level  UUCP  email  service  and a White Pages service
            available over the Internet (see section 4.3 of the _I_n_t_e_r_n_e_t
            _R_e_s_o_u_r_c_e _G_u_i_d_e).  ClariNet News, a live electronic newspaper
            from ClariNet Communications Corp., is also available to PSI
            customers through the PSINet system.



























            May 16 1991                 NNSC       Section 5.36,  Page 2