one ▁R ivers ▁to ▁overflow ▁and ▁emb ank ment ▁collapse . ▁The ▁resulting ▁flo ods ▁and ▁de br is ▁flow ▁kill ▁between ▁ 1 , 0 7 7 ▁and ▁ 1 , 9 2 0 ▁people , ▁inj uring ▁ 1 , 5 4 7 ▁and ▁leaving ▁ 8 5 3 ▁missing . ▁ ▁September ▁ 1 7 ▁– ▁ 2 1 ▁– ▁The ▁ 1 9 4 7 ▁Fort ▁La ud erd ale ▁h urr icane ▁in ▁sout he astern ▁Florida , ▁and ▁also ▁in ▁Alabama , ▁Mississippi , ▁and ▁Louisiana ▁causes ▁w ides p read ▁damage , ▁and ▁k ills ▁ 5 0 ▁people . ▁ ▁September ▁ 1 8 ▁ ▁The ▁National ▁Security ▁Act ▁of ▁ 1 9 4 7 ▁becomes ▁effective ▁on ▁this ▁day , ▁creating ▁the ▁United ▁States ▁Air ▁Force , ▁National ▁Security ▁Council ▁and ▁the ▁Central ▁Int elligence ▁Agency . ▁ ▁The ▁War ▁Department ▁becomes ▁the ▁Department ▁of ▁the ▁Army , ▁a ▁branch ▁of ▁the ▁new ▁Department ▁of ▁Def ense . ▁ ▁September ▁ 2 2 ▁– ▁The ▁Information ▁Bureau ▁of ▁the ▁Commun ist ▁and ▁Work ers ' ▁Part ies ▁( Comm un ist ▁Information ▁Bureau , ▁" Com in form ") ▁is ▁founded . ▁ ▁September ▁ 3 0 ▁– ▁Pakistan ▁and ▁Y emen ▁join ▁the ▁United ▁Nations . ▁ ▁October ▁▁▁ ▁October ▁– ▁First ▁recorded ▁use ▁of ▁the ▁word ▁computer ▁in ▁its ▁modern ▁sense , ▁referring ▁to ▁an ▁electronic ▁digital ▁machine . ▁ ▁October ▁ 1 ▁– ▁The ▁North ▁American ▁F - 8 6 ▁Sab