Before revision: After the introduction of VHS and Betamax formats in the mid 1970s , videocassette recorders (VCR) started gaining mass market traction—by 1982, 10% of UK households owned a VCR.
After revision: After the introduction of VHS and Betamax formats in the mid-1970s , videocassette recorders (VCR) started gaining mass market traction—by 1982, 10% of UK households owned a VCR.