Special Issue, guest-edited by Jiri Horak, Janusz Kacprzyk, Ashley Morris, Jan W. Owsiński and Sławomir Zadrożny.
Papers by: P.B. Keenan; R. Ladner, F. Petry, E. Warner & K. Gupta; J. Horak, J. Unucka, J. Stromsky, V. Marsik & A. Orlik; A. Schmitz & A. Morris; N. Van De Weghe, A.G. Cohn, G. De Tre & P. De Maeyer; P.V. Gorsevski, P. Jankowski & P.E. Gessler; J. Verstraete, G. De Tre and A. Hallez; G. Vert, A. Morris & J.S. Heaton

Papers by: P. Fulmański & A. Nowakowski; J. Lovisek and J. Kralik; J.-D. Chen; J. Roy; A. Kondratiuk-Janyska & M. Kałuszka; P. Holnicki; L. Klukowski; R. Kalicka & D. Bochen; L. Knopik; A. Niewiadomski, J. Ochelska & P.S. Szczepaniak; W.K.M. Brauers & E.K. Zavadskas; L. Ustinovichius, V. Podvezko & R. Ginevicius; Y. Uemura;
Book reviews by K. Malanowski; A. Myśliński; D. Dąbrowska

The issue contains also the memorial note about Z. Bubnicki by A. Niederliński

Special Issue, guest edited by Art Lew and Moshe Sniedovich, with papers by M. Sniedovich & A. Lew; J. Hartman & T.C. Perry; M. Sniedovich & S. Voss; Ch. Wilbaut et al.; M. Sniedovich; A. Lew; A.B. Piunovskiy; A.P. Tereso, J.R.M. Mota & R.J.T. Lameiro; H. Mauch; M. Werner; L. Popova-Zeugmann.

Special issue, guest-edited by Zbigniew Bartosiewicz and Ewa Girejko, with papers by Z. Bartosiewicz & E. Pawłuszewicz; P. Bettiol; A. L. Dawidowicz & A. Poskrobko; E. Girejko & Z. Bartosiewicz; P.D.F. Gouveia, D.F.M. Torres & E.A.M. Rocha; D. Janczak & Y. Grishin; J. Jordan; A.B. Malinowska; C.S. Moreira; D. Mozyrska & Z. Bartosiewicz; T. Mullari et al.; Ch. Prieur & E. Trelat; E.A.M. Rocha & D.F.M. Torres; C.J. Silva& D.F.M. Torres; M. Wyrwas; Z. Zaczkiewicz & V. Marchenko.