> as lemmas
write permit ring
write permit ring n.
Brit. 
/ˌrʌɪt pəˈmɪt rɪŋ/
, /ˌrʌɪt pəˈmɪt rɪŋ/U.S. /ˌraɪt pərˈmɪt ˌrɪŋ/
Computing (now chiefly historical) a ring which has to be fitted into a groove in the back of a tape reel before the tape can be written to; cf. sense 13./ˌraɪt pərˈmɪt ˌrɪŋ/ΘΚΠ
society > computing and information technology > hardware > secondary storage > [noun] > magnetic > tape drive > enabling writing
write permit ring1961
1961 R. B. Smith & C. H. Hunter BKS Syst. for Philco-2000 Computer 51/2 Mount blanks on Tα, Tβ, Tγ. This is a System request to have blank tapes with write permit rings mounted on specific tape transports.
1980 S. Hockey Guide Computer Applic. Humanities ii. 27 One way of ensuring that this does not happen is to use..a write permit ring, a plastic ring which can be inserted in the back of a tape reel.
2014 A. Morton Night Shift iii. 19 We then devised a game of quoits, using the four inch (10 centimetres) diameter coloured plastic write permit rings that fitted into the back of mag-tapes.
<
as lemmas