\bibitem{Lottor:CACM-34-11-21}
Mark Lottor.
\newblock Internet domain system.
\newblock {\em Communications of the Association for Computing Machinery},
34(11):21--22, November 1991.
\newblock This letter reports that the ZONE program at the Network Information
Systems Center at SRI International in July 1991 found approximately 535,000
Internet hosts in 16,000 domains. The 10 largest domains were EDU
(educational)--206,000, COM (commercial)--144,000, GOV (government)---36,000,
MIL (military) 26,000, AU (Australia)--22,000, DE (Germany)---21,000, CA
(Canada)--19,000, ORG (organizations)---15,000, SE (Sweden)---12,000, and CH
(Switzerland)---10,000.
\bibitem{Unilogic:SDP84}
Unilogic, Ltd.
\newblock {\em Scribe Document Production System User Manual}, April 1984.