Make it so that integrated circuits and anything above their level of technology is developed for military and scientific use, but not for civilian use. For civilians a mid-1950s level of technology remains. Radios and televisions become somewhat widespread, as are cars, and household appliances not requiring microchips. Microcomputers are made only for military and scientific use but are likely more primitive than OTL computers because civilian needs like user-friendliness and gaming are not taken into account and they are developed by state-run companies rather than profit-oriented private companies.
Basically there needs to be a cultural or ideological divergence that makes governments think that a 1950s level of technology is "enough" for the Average Joe and anything more advanced should be focused on developing better armies and aiding scientific research.
Of course, advanced technology isn't forbidden to civilians, there's just a general notion that "it isn't needed for laypeople." Similar to how OTL civilians don't demand military-grade computers and the latest advances of nanotechnology in their living rooms.
Can you think up a plausible scenario that would result in a world like this?