interest of strengthening peace and security to prevent further vertical and borizontal proliferat.ion of nuclear teapons. The fact that soDe I25 non-nuclea r{re apon States have become Parties Eo the Non-Prol-ife rat ion Treaty deoonst.rateel thal preventing the apread of nuclear lreapons to additlonal- States is seen Co be of connon securl.ty interegt. In the task of achieving the goals of nuclear disarnanent, all the nuclear-$eapon States, in parEicular those anong Ehem chat Poaseas the moat ioportant nuclear arsenals, bear a special responsibility. Nuclear-ueapon States should nake effective arrangenents to assure non-nuclear-seapon Stateg against tbe uae or EhreaE of use of nuclear {eapons. 182. The Non-ProI lfera tion Tre8ty representa an undertaklng by non-nuc lear -neaPonstates not. to acquire nuclear eeapons or other nuclear explosive devices and to accept tlrat the peaceful uses of atomic energy be put under internaEionaL safeguards and i.nspection through IAEA. The nuclear-rreapon StaEes undertake noe totransfer to or asglse non-nuclear -seapon states to acquire nuclear weapona or of,ber nucl.ear exploaive devices and to pursue in goo4 falth negotiat.ions on effective IDeasures relating to cesaaCion of tbe nuclear aros race at an early date and toA/ 40/553 EngI ish Page 48 nuclear disarmanent. AII states should have access to and be free Eo acquire technology, equipnent and nateriaLs for peaceful uaes of nuclear energy. The safeguard provisions of the Treaty have been suPplenenled by arrangeloenEs amonq nations producing nuclear technology snat Daterlals to restrict the erport of certain itens that could be used for the production of nuclear weapons. Sone countries nalntain that, Hhile aerving non-Prolifer E tion purPosea' these arrangenents also repreaenE a supplenentary obstacle for the peaceful usea of nuclear energy by sorh non-nucleaf -seaPon SEateg' 183. since 1964, the numhr gf declared nuclear-seapon staEes has not increased- Undoubtedly, paru of the credit. go€s to reeErainEa accePted under Ehe
**Analysis**
This text appears to be discussing the prevention of the proliferation of nuclear weapons and the promotion of peace and security. It mentions the Non-Proliferation Treaty and the responsibilities of nuclear-weapon states. The text also touches on the issue of access to technology and materials for peaceful uses of nuclear energy. Given the focus on international relations, security, and the regulation of nuclear energy, I hypothesize that the text is most closely related to the categories of International relations and Science and technology.

**Category**
International relations, Science and technology