INFORMATICAInformatica0868-49520868-4952VUINF1010110.3233/INF-1998-9101OtherGuest Editorial: Special Issue on Programming Theory, Information System Engineering, Software Engineering, and Artificial IntelligenceČaplinskasAlbertasalcapl@ktl.mii.ltInstitute of Mathematics and Informatics, Akademijos 4, 2600 Vilnius, Lithuania0101199910134