| PRESTEL | Brand name for the Post Office's Viewdata technology developed during the late 1970s |
| PROLOGIC | Surround sound processing technology developed by Dolby Laboratories in 1987 (3,5) |
| TURBODIESEL | A notable addition to the Peugeot 604 range during the late 1970s (11) |
| BOTHA | PW _, Prime Minister and later President of South Africa during the late 1970s and 1980s (5) |
| CITYSTATEANDZIP | The post office's 33-Across |
| VIDEOTEXT | Viewdata vetted with 10 loosely around end of appendix (9) |
| DEPOPROVERA | Brand name for the contraceptive drug medroxyprogesterone acetate (4-7) |
| ALEVE | A brand name for the anti-inflammatory pain reliever naproxen |
| GEORGIAN | Description of the style of architecture which developed during the reigns of the four Hanoverian kings of Great Britain (8) |
| LORAN | Radio-based navigation system developed during the Second World War that was derived from the princi |
| NEWAGE | Term applied to a range of spiritual or religious beliefs which developed during the 1970s (3,3) |
| PACKET | Something for the postman to deliver working for the post office overseas? (6) |
| OTHELLO | Brand name for the board game Reversi |
| AMBIEN | Brand name for the sleep aid zolpidem |
| NASONEX | Brand name for the steroid mometasone |
| VIAGRA | Brand name for the drug Sildenafil citrate |
| ATLANTICCITY | Gambling resort, the most popular tourist destination in the US during the late 1980s (8,4) |
| FLINT | Form of quartz used by humans to make stone tools for at least two million years which further developed during the Mesolithic period with microliths (5) |
| STEN | --- gun, a light 9mm sub-machine-gun formerly used in the British Army, developed during the Second World War (4) |
| NISSENHUT | Prefabricated type of building originally developed during the First World War to house troops (6,3) |
