MAJOR TRADE AND PROFESSIONAL PUBLICATION, ONLINE MID RELATED PROPERTY ACQUISITIONS, FOURTH QUARTER, 1999.

                 MAJOR TRADE AND PROFESSIONAL PUBLICATION,
                 ONLINE MID RELATED PROPERTY ACQUISITIONS,
                           FOURTH QUARTER, 1999
Publication/Property                       Buyer
Microsoft Certified Pro.                   lOlComm./Chatsworth, CA
  "TechMentor" conference and Web sites
Info 21                                    Advanstar/Cleveland, OH
  Documents, Messaging and Security
  trade show
Blue Sheet Publications                    Amer. Lawyer Media/New York
Security Ind. Buyers Gd.                   ASIS/Arlington, VA
Chadwyck-Healey Ltd.                       Bell+Howell Info/Ann Arbor, MI
Truck Owner                                Cahners Bus. Info./Newton, MA
  rpm
Lubricants World                           Chemical Week Assoc./New York
Chemical Engineering                       Chemical Week Assoc./New York
  Modern Plastics & MP International
  Modern Mold & Tooling, trade shows,
  buyer's guides & related assets
F&W Publications                           Citicorp Venture Cap./New York
  I.D. Magazine and three other magazines
WebReview.com                              CMP/Manhasset, NY
Champion Productions                       Cygnus Pub./St. Petersburg, FL
  including 13 trade shows
clickdata.com                              Dolan Media.Minneapolis, MN
Hogan Info. Services                       Dolan Media/Minneapolis, MN
Compliance                                 Douglas Publ./Richmond, VA
  FacilityCare
The Surfaces Show                          Hanley-Wood/Wash. D.C.
Worldpower and Energy                      Hart Publ./Houston, TX
Baskerville Comm.                          Informa Group/London, Eng.
  including 13 newsletters
Int. Freighters Weekly                     Informa Group/London, Eng.
  Fishing News
  Insurance Age
  Containerization Int.
  Liner Shipping Network (online),
  exhibitions & events
Television World                           Informa Group/London, Eng.
  Television Business Int.
  Automotive World, four other magazines,
  60 newsletters, 600 management reports
  and 24 directories
KM World                                   Information Today/Medford, NJ
  conferences, Web site and related assets
Internet News Bureau                       Internet.com/Westport, CT
LinuxCentral.com                           Internet.com/Westport, CT
Telecom Business                           Intertec/Overland Park, KS
  Telecard World
  Telecom Business Conference & Expo
J.K. Lasser Tax series                     John Wiley & Sons/New York
Octane                                     June Warren Publ./Edmonton, AB
  OilWeek
Inn Business                               Kenilworth/Mississauga, ON
Launchspace                                Launchspace Publ./McLean, VA
  Int. Space Industry Report NL
  and Web site
Caselaw Elec. Publishers                   Lexis-Nexis/Dayton, OH
Computer Currents                          MSP Comm./Minneapolis, MN
  including seven regional editions
Silicon Valley High Tech                   NetUSA/Fremont, CA.
Optical Prism                              Nusand Publ./Toronto, ON
Publication/Property                       Seller
Microsoft Certified Pro.                   QuickStart/Irvine, CA
  "TechMentor" conference and Web sites
Info 21                                    Gruppe 21 Info./Essen, Ger.
  Documents, Messaging and Security
  trade show
Blue Sheet Publications                    management/Houston, TX
Security Ind. Buyers Gd.                   Phillips Bus./Potomac, MD
Chadwyck-Healey Ltd.                       management/Cambridge, Eng.
Truck Owner                                Classic III/Cummings, GA
  rpm
Lubricants World                           Hart Publ./Houston, TX
Chemical Engineering                       McGraw-Hill/New York
  Modern Plastics & MP International
  Modern Mold & Tooling, trade shows,
  buyer's guides & related assets
F&W Publications                           management/Cincinnati, OH
  I.D. Magazine and three other magazines
WebReview.com                              Songline/Sebastopol, CA
Champion Productions                       1st Comm./Chicago, IL
  including 13 trade shows
clickdata.com                              Marketing Solutions/S.F., CA
Hogan Info. Services                       First Data/Okla. City, OK
Compliance                                 IHS Publ./Libertyville, IL
  FacilityCare
The Surfaces Show                          WFCA/Washington, D.C.
Worldpower and Energy                      W&E Ltd./London, Eng.
Baskerville Comm.                          management/Sherman Oaks, CA
  including 13 newsletters
Int. Freighters Weekly                     EMAP/London, Eng.
  Fishing News
  Insurance Age
  Containerization Int.
  Liner Shipping Network (online),
  exhibitions & events
Television World                           Financial Times/London, Eng.
  Television Business Int.
  Automotive World, four other magazines,
  60 newsletters, 600 management reports
  and 24 directories
KM World                                   Bill Comm./New York
  conferences, Web site and related assets
Internet News Bureau                       Multimedia Mrktg./Bend, OR
LinuxCentral.com                           management/Clinton Twp., MI
Telecom Business                           Multimedia Publ./Houston, TX
  Telecard World
  Telecom Business Conference & Expo
J.K. Lasser Tax series                     IDG Books/Foster City, CA
Octane                                     Rogers Media/Toronto, ON
  OilWeek
Inn Business                               Perf-Link Publ./Toronto, ON
Launchspace                                Phillips Bus./Potomac, MD
  Int. Space Industry Report NL
  and Web site
Caselaw Elec. Publishers                   management/Las Vegas, NV
Computer Currents                          management/Berkeley, CA
  including seven regional editions
Silicon Valley High Tech                   US Broadnet Comm./S.F., CA
Optical Prism                              Vezcom Inc./Unionville, ON
IQXpert (online)         PartMiner/New York
Advanced Packaging       PennWell/Tulsa, OK
  Connector Specifier
  Vacuum & Thinfilm
  SMT & SMT Asia/Pacific
Nutracon Conference      Penton Media/Cleveland, OH
Stardust.com             Penton Media/Cleveland, OH
Information Resources    Phillips Bus. Info/Potomac, MD
IDD Enterprises          Platinum Equity/L.A., CA
Current Legal Resources  QL Systems/Kingston, ON
InterBev Exhibition      Reed Exhibitions/New York
TowerGroup (84%)         Reuters/London
NewsEdge Corp.           RoweCom/Cambridge, MA
Science Weekly NL        Steck-Vaughn/Austin, TX
high school texts        Tribune Educ./Chicago, IL
Meeks Heit Publishing    Tribune Educ./Chicago, IL
ZD Education             U.S. Equity Partners/New York
Int. Media Guides        VNU USA/Chicago, IL
Dow Jones Financial Pub  Wicks Bus. Inf./Fairfield, CT
  Investor Advisor
  Asset Management
  Property and Realty
  Stock                  NL
Ziff-Davis Publishing    Willis, Stein Part./Chi., IL
Coresearch Inc.          Wolters Kluwer/Riverwoods, IL
Summers Press            Wolters Kluwer/Riverwoods, IL
IQXpert (online)         IHS Group/Englewood, CO
Advanced Packaging       IHS Publ./Libertyville, IL
  Connector Specifier
  Vacuum & Thinfilm
  SMT & SMT Asia/Pacific
Nutracon Conference      Global Bus. Res./Stam., CT
Stardust.com             management/Campbell, CA
Information Resources    management/Rosslyn, VA
IDD Enterprises          Dow Jones/New York
Current Legal Resources  management/Bethpage, NY
InterBev Exhibition      NSDA/Washington, D.C.
TowerGroup (84%)         management/Needham, MA
NewsEdge Corp.           stockholders/Burlington, MA
Science Weekly NL        SWI/New York
high school texts        Thomson Learning/Stam., CT
Meeks Heit Publishing    management/Columbus, OH
ZD Education             Ziff-Davis/New York
Int. Media Guides        S&H Media Part./Nashua, NH
Dow Jones Financial Pub  Dow Jones/Shrewsbury, NJ
  Investor Advisor
  Asset Management
  Property and Realty
  Stock
Ziff-Davis Publishing    Ziff-Davis/New York
Coresearch Inc.          VS&A Comm. Partners/New York
Summers Press            management/Fort Worth, TX
Arranged by buyer. Titles in bold are magazines or
journals unless otherwise noted. NL-newsletter