▁reduced ▁typ ographic ▁quality . ▁ ▁In ▁September ▁ 1 9 6 9 , ▁EC MA ▁started ▁work ▁to ▁rev ise ▁its ▁published ▁standard . ▁To ▁make ▁O CR - B ▁more ▁widely ▁accepted , ▁the ▁shapes ▁of ▁some ▁characters ▁were ▁slightly ▁modified . ▁The ▁new ▁revision ▁removed ▁font ▁size ▁II , ▁which ▁had ▁been ▁rarely ▁used ▁in ▁practice ; ▁it ▁deleted ▁five ▁character ▁shapes ; ▁and ▁it ▁added ▁a ▁new ▁font ▁size ▁IV . ▁EC MA ▁published ▁the ▁second ▁edition ▁of ▁O CR - B ▁in ▁October ▁ 1 9 7 1 . ▁ ▁In ▁March ▁ 1 9 7 6 , ▁EC MA ▁published ▁a ▁third ▁revision ▁of ▁its ▁EC MA - 1 1 ▁specification . ▁It ▁added ▁the ▁symbols ▁§ ▁and ▁ ¥ ▁to ▁O CR - B ; ▁two ▁types ▁of ▁er asure ▁marks ▁( █ ) ▁for ▁black ening ▁out ▁mis - print ed ▁characters ▁were ▁added ; ▁and ▁the ▁length ▁of ▁the ▁Vert ical ▁bar ▁was ▁changed ▁to ▁match ▁ISO   1 0 7 3 - 2 . ▁ ▁In ▁ 1 9 9 3 , ▁Turkey ▁proposed ▁extending ▁ISO ▁ 1 0 7 3 - 2 ▁to ▁include ▁the ▁Turkish ▁letters ▁ <0xC4> <0x9E> ğ , ▁ İ ı , ▁and ▁ Ş ş . ▁The ▁request ▁was ▁generalized ▁to ▁extend ▁O CR - B ▁with ▁a ▁number ▁of ▁Latin ▁and ▁Greek ▁letters ▁used ▁in ▁European ▁languages . ▁A ▁revision ▁of ▁the ▁ISO   1 0 7 3 - 2 : 1 9 7 6 ▁standard