However, the technology has undergone a steady stream of innovations and upgrades since it first showed up as an OEM option in the 1950s.
Otú ọ dị, nkà na ụzụ aghọwo ihe ọhụrụ na-agbanwe agbanwe na mmelite ebe ọ bụ na mbụ gosiri dị ka nhọrọ OEM na 1950.