00000nz  a2200000n  4500
001  KSH1998031751
005  20000319081445
008  980429 n azknn|abn          |a a|a    | 
150  ▼a버스 토폴로지[bus topology]▲
450  ▼wr▼i영어▼abus topology▲
550  ▼a버스(컴퓨터)[bus]▲