Code 135 - Coded Data Field: Computer Files (Provisional) (R)Indicators: blankSubfield codes $a Coded Data for Computer Files (Not repeatable) $a/0 Type of computer filea = numeric b = computer program(s) c = representational d = text u = unknown v = combination z = other$a/1 Special Material Designationa = cartridge magnetic tape b = computer chip in cartridge c = computer optical disc cartridge f = computer magnetic cassette tape h = magnetic tape for main-frame computers j = computer floppy disk m = computer magneto-optical disk o = computer optical disk r = online systems u = unknown z = other$a/2 Coloura = One colour b = Black-and-white c = Multicoloured g = Grey scale m = Mixed n = Not applicable u = Unknown z = Other$a/3 Dimensionsa = 31/2 in e = 12 in g = 43/4 in or 12 cm i = 1 1/8 x 2 3/8 in j = 3 7/8 x 21/2 in n = Not applicable o = 51/4 in u = Unknown v = 8 in. z = Other$a/4 Sound# = No sound (silent) a = Sound on medium u = Unknown$a/5-7 Image Bit Depth001-999 = Exact bit depth mmm = Multiple (more than one image type) nnn = Not applicable --- = Unknown$a/8 Number of File Formatsa = One file format m = Multiple file formats u = Unknown$a/9 Quality Assurance Target(s)a = Absent n = Not applicable p = Present u = Unknown$a/10 Antecedent/Sourcea = File reproduced from original b = File reproduced from microform c = File reproduced from electronic resource d = File reproduced from an intermediate source other than microform m = Mixed n = Not applicable u = Unknown$a/11 Level of Compressiona = Uncompressed b = Lossless d = Lossy m = Mixed u = Unknown$a/12 Reformatting Qualitya = Access n = Not applicable p = Preservation r = Replacement u = Unknown