Both, skilled and unskilled
they allowed both unskilled and skilled workers
The four major categories of labor are skilled labor, unskilled labor, semi-skilled labor, and professional labor. Skilled labor requires specialized training or certification, unskilled labor does not require specialized training, semi-skilled labor falls between skilled and unskilled labor, and professional labor requires advanced education and expertise in a specific field.
Unskilled or entry level.
unskilled labor
There is a difference between semi-skilled labor and unskilled labor. Semi-skilled labor requires some training. Unskilled labor does not require the same type of training.
skilled, semi- skilled and unskilled
the three features of labour are: skilled semi-skilled unskilled
They were mostly used for unskilled labor.
unskilled, semi-skilled and skilled labor
the synonym for skilled might something along the lines of unskilled.
They are sperta and nesperta.