UL satifiketi
UL ndiye chidule cha Underwriters Laboratories of America. UL Safety Testing Institute ndi yovomerezeka kwambiri ku United States komanso bungwe lalikulu kwambiri labizinesi lomwe likuchita kuyezetsa ndi kuyesa chitetezo padziko lonse lapansi. Ndi bungwe lodziyimira pawokha, lopindulitsa lomwe limayesa chitetezo cha anthu. Amagwiritsa ntchito njira zoyesera zasayansi kuti aphunzire ndikuzindikira ngati zida zosiyanasiyana, zida, zida, zida, nyumba, ndi zina zotere zili zovulaza moyo ndi katundu komanso kuchuluka kwa zovulaza; kudziwa, kusonkhanitsa ndi kutulutsa miyezo yofananira ndikuthandizira kuchepetsa ndi kuteteza moyo Deta pa kuwonongeka kwa katundu, pochita bizinesi yofufuza zowona.
Chiphaso cha FCC
Bungwe la US Federal Communications Commission linakhazikitsidwa ndi COMMUNICATIONACT mu 1934. Ndi bungwe loyima palokha la boma la US ndipo limayang'anira bungwe la Congress. FCC imagwirizanitsa zoyankhulana zapakhomo ndi zapadziko lonse lapansi poyang'anira kuwulutsa kwa wailesi, wailesi yakanema, matelefoni, ma satellite ndi zingwe. Zinthu zambiri zamawayilesi, zolumikizirana, ndi zida zamagetsi zimafunikira chivomerezo cha FCC kuti zilowe mumsika waku US. Komiti ya FCC imafufuza ndikusanthula magawo osiyanasiyana achitetezo chazinthu kuti apeze njira yabwino yothetsera vutoli. Nthawi yomweyo, FCC imaphatikizanso kuyesa zida zamawayilesi ndi ndege.
