. ▁Factory ▁system . ▁Big ▁business ▁ 2 3 6 5 - 2 3 8 5 .... ... Contract ing . ▁Let ting ▁of ▁contract s ▁ 2 4 2 1 - 2 4 2 9 .... ... Tra de ▁associations ▁ 2 7 0 9 - 2 9 3 0 . 7 ..... Cor por ations ▁( In cluding ▁international ▁business ▁enter pr ises , ▁divers ification , ▁industrial ▁concentration , ▁public ▁util ities ) ▁ 2 9 5 1 - 3 5 7 5 .... ... Co operation . ▁Cooper ative ▁soci eties ▁ 3 6 1 1 - 4 7 3 0 . 9 ..... Ind ust rial ▁policy . ▁The ▁state ▁and ▁industrial ▁organization ▁( In cluding ▁lic ens ing ▁of ▁occup ations ▁and ▁prof essions , ▁subs id ies , ▁ins pection , ▁government ▁ownership , ▁municipal ▁services ) ▁ 4 8 0 1 - 8 9 4 3 ........ L abor . ▁Work . ▁Working ▁class ▁ 4 8 6 1 - 4 8 9 5 .... ... L abor ▁systems ▁ 4 9 0 9 - 5 1 0 0 . 9 ..... W ages ▁ 5 1 0 6 - 5 2 6 7 .... ... H ours ▁of ▁labor ▁( In cluding ▁over time , ▁shift ▁work , ▁sick ▁leave , ▁vac ations ) ▁ 5 3 0 6 - 5 4 7 4 .... ... L abor ▁disput es . ▁St rik es ▁and ▁lock outs ▁ 5 4 8 1 - 5