The social gap between those who can use computers and those who cannot is widening.
The stratification between PC users and non-PC users is getting more severe.
ご質問ありがとうございます。
① "The social gap between those who can use computers and those who cannot is widening."＝「PCが使える人間と使えない人間の間で、社会的な格差が広がっている。」
② "The stratification between PC users and non-PC users is getting more severe."＝「PCを使う人間と使わない人間の階層化が更に厳しくなっている。」
ご参考に。
アメリカ合衆国 
