LC MARC Backfile

LC MARC Backfile contains older bibliographic records that were received from the Library of Congress.

The Library Corporation, Research Park, Inwood, WV 25428

Overall Statistics

Description	Maximum	Minimum	Average	Totals
Number of Records	-	-	-	5796482
Characters per Record	15977	142	737	4274939638
Characters per Field	9988	2	33	3787917020
Fields per Record	131	7	19	111611811

Record Status (MARC Leader Position 05)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Higher Encoding Level	a	199272	3.44	139969680	3.27
Corrected or Revised	c	3432167	59.21	2694394021	63.03
New	n	1792197	30.92	1197927150	28.02
Correction from Prepublication	p	372846	6.43	242648787	5.68

Record Type (MARC Leader Position 06)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Language Material	a	5122949	88.38	3643620355	85.23
Printed Music	c	67441	1.16	45614727	1.07
Manuscript Music	d	1484	0.03	971220	0.02
Printed Map	e	164577	2.84	144018716	3.37
Manuscript Map	f	1367	0.02	1569024	0.04
Projected Media	g	99938	1.72	100847185	2.36
Nonmusical Sound Recording	i	42650	0.74	41561713	0.97
Musical Sound Recording	j	224132	3.87	218433099	5.11
Two Diminsional, Non-Projection	k	61688	1.06	66707937	1.56
Computer File	m	9936	0.17	11278995	0.26
Kits	o	9	0.00	8812	0.00
Three Dimensional Artifact	r	16	0.00	16175	0.00
Manuscript Material	t	289	0.00	287398	0.01
Unknown Code	[unprintable]	6	0.00	4282	0.00

Bibliographic Level (MARC Leader Position 07)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Monographic Component	a	1771	0.03	2100292	0.05
Serial Component	b	2	0.00	2989	0.00
Collection	c	2187	0.04	3464092	0.08
Subunit	d	13325	0.23	18311586	0.43
Monograph Item	m	5000182	86.26	3570120808	83.51
Serial	s	779015	13.44	680939871	15.93

Control Type (MARC Leader Position 08)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
No Specified Type	[blank]	5796482	100.00	4274939638	100.00

Character Encoding (MARC Leader Position 09)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
MARC-8	[blank]	5796482	100.00	4274939638	100.00

Encoding Level (MARC Leader Position 17)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Full Level	[blank]	3583022	61.81	2706261468	63.31
Full; Unexamined	1	1061505	18.31	659286430	15.42
Less Than Full Level	2	5485	0.09	6217390	0.15
Abbreviated Level	3	36748	0.63	25542475	0.60
Core Level	4	369805	6.38	310132930	7.25
Preliminary Level	5	73589	1.27	53107240	1.24
Minimal Level	7	566795	9.78	436678136	10.21
Pre-publication	8	98485	1.70	77111825	1.80
Unknown Level	u	705	0.01	357319	0.01
Not Applicable	z	343	0.01	244425	0.01

Descriptive Cataloging Form (MARC Leader Position 18)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Non ISBD Form	[blank]	1416358	24.43	854118409	19.98
AACR2	a	3824924	65.99	3058218315	71.54
ISBD Form	i	519919	8.97	333741474	7.81
Unknown	u	206	0.00	136838	0.00
Unknown Code	[unprintable]	35075	0.61	28724602	0.67

Linked Record Requirement (MARC Leader Position 19)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Related Record not Required	[blank]	5796482	100.00	4274939638	100.00

Modified Record (MARC 008 Position 38)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Not modified	[blank]	5698944	98.32	4212099777	98.53
Dashed-on Omit.	d	2497	0.04	1745173	0.04
Romanized	o	5666	0.10	4747955	0.11
Romanized script	r	1281	0.02	1050459	0.02
Shortened	s	1692	0.03	1288221	0.03
Missing Characters	x	1008	0.02	649571	0.02
No attempt to code	|	85391	1.47	53355957	1.25
Unknown Code	[unprintable]	3	0.00	2525	0.00

Cataloging Source (MARC 008 Position 39)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Library of Congress	[blank]	4559021	78.65	3181461889	74.42
National Ag. Lib.	a	126	0.00	71115	0.00
National Lib. Med.	b	4198	0.07	2741937	0.06
LC Coop. Cat.	c	254873	4.40	232022409	5.43
Other Sources	d	975789	16.83	856395348	20.03
Report to NST	n	6	0.00	4266	0.00
Unknown Source	u	2363	0.04	2117396	0.05
No attempt to code	|	106	0.00	125278	0.00

Target Audience (MARC 008 Position 22)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Unknown or not spec.	[blank]	4498470	77.61	3177296966	74.32
Preschool	a	8451	0.15	6172896	0.14
Primary	b	35122	0.61	27707616	0.65
Pre-adolescent	c	40030	0.69	35365539	0.83
Adolescent	d	11763	0.20	10465132	0.24
Adult	e	54915	0.95	48306407	1.13
Specialized	f	10872	0.19	10051356	0.24
General	g	3136	0.05	2626497	0.06
Juvenile	j	187951	3.24	130447799	3.05
No attempt to code	|	2812	0.05	2403813	0.06
Unknown Code	[unprintable]	1	0.00	741	0.00

Collection Age (MARC 008 Position 07-10)

Description	Record Count	Percent of Records	File Space Consumed	Percent of File Space
--- 2010 ---	8	0.00	8053	0.00
--- 2009 ---	16	0.00	12371	0.00
--- 2008 ---	559	0.01	445160	0.01
--- 2007 ---	19626	0.34	17421581	0.41
--- 2006 ---	80646	1.39	75666129	1.77
--- 2005 ---	110665	1.91	99201163	2.32
--- 2004 ---	119781	2.07	104584977	2.45
--- 2003 ---	124788	2.15	104786337	2.45
--- 2002 ---	124063	2.14	104008496	2.43
--- 2001 ---	126027	2.17	102745977	2.40
--- 2000 ---	137926	2.38	110142226	2.58
--- 1999 ---	127749	2.20	100547297	2.35
--- 1998 ---	125301	2.16	98089041	2.29
--- 1997 ---	122222	2.11	94503030	2.21
--- 1996 ---	121978	2.10	93967549	2.20
--- 1995 ---	121572	2.10	93238368	2.18
--- 1994 ---	123109	2.12	95130909	2.23
--- 1993 ---	120156	2.07	91582186	2.14
--- 1992 ---	118132	2.04	89342296	2.09
--- 1991 ---	116710	2.01	87771100	2.05
--- 1990 ---	136019	2.35	105179569	2.46
1980 - 1989	1050789	18.13	788367157	18.44
1970 - 1979	960520	16.57	657952463	15.39
1960 - 1969	480297	8.29	302817014	7.08
1950 - 1959	209968	3.62	131979558	3.09
1940 - 1949	159333	2.75	108786148	2.54
1930 - 1939	145498	2.51	98854097	2.31
1920 - 1929	113268	1.95	74318919	1.74
1910 - 1919	89719	1.55	61489179	1.44
1900 - 1909	212511	3.67	159409148	3.73
1890 - 1899	57517	0.99	39909082	0.93
1880 - 1889	44997	0.78	30434293	0.71
1870 - 1879	34121	0.59	23893538	0.56
1860 - 1869	32756	0.57	26145733	0.61
1850 - 1859	24666	0.43	18338997	0.43
1840 - 1849	18107	0.31	13509794	0.32
1830 - 1839	14268	0.25	10659903	0.25
1820 - 1829	10070	0.17	7819975	0.18
1810 - 1819	6985	0.12	5750658	0.13
1800 - 1809	13414	0.23	9741924	0.23
1790 - 1799	6217	0.11	5884911	0.14
1780 - 1789	3414	0.06	3525543	0.08
1770 - 1779	2889	0.05	3049042	0.07
1760 - 1759	1734	0.03	1654829	0.04
1750 - 1759	1530	0.03	1397014	0.03
1740 - 1749	1167	0.02	1104969	0.03
1730 - 1739	914	0.02	853318	0.02
1720 - 1729	857	0.01	824179	0.02
1710 - 1719	839	0.01	778008	0.02
1700 - 1709	994	0.02	854084	0.02
1600 - 1699	4725	0.08	4929776	0.12
1500 - 1599	657	0.01	803778	0.02
1400 - 1499	46	0.00	50502	0.00
1300 - 1399	8	0.00	5716	0.00
1200 - 1299	4	0.00	2613	0.00
1100 - 1199	6	0.00	4234	0.00
1000 - 1099	4877	0.08	3193798	0.07
Date Unknown	2046	0.04	1417327	0.03
Pre 1000	265	0.00	174349	0.00
No Date	7410	0.13	5856211	0.14
Unknown Code	26	0.00	24042	0.00

Languages (MARC 008 Position 35-37)

Description	Record Count	Percent of Records	File Space Consumed	Percent of File Space
NOT CODED	164489	2.84	150249947	3.51
ENGLISH	5631993	97.16	4124689691	96.49

Census of MARC Fields Used in the Collection

Tag	Records with Tag	Repeated Fields	Max Length	Min Length	Averge Length	Percent of Records	File Space Consumed	Percent of File Space
1	5796482	-	27	11	12	100.00	74309098	1.74
3	4433222	-	6	3	3	76.48	13299684	0.31
5	5668797	-	16	16	16	97.80	90700752	2.12
6	36770	64	43	17	18	0.64	664573	0.02
7	710535	162557	30	2	10	15.06	9326488	0.22
8	5796482	-	40	40	40	100.00	231859280	5.42
10	5796481	1	520	11	17	100.00	99012273	2.32
12	2309	-	35	5	6	0.04	14959	0.00
15	376388	211	99	5	12	6.50	4589098	0.11
16	41361	7759	74	12	17	0.85	848426	0.02
17	62701	22	277	8	36	1.08	2290437	0.05
19	132	-	39	10	11	0.00	1568	0.00
20	2595293	355665	294	4	21	50.91	62789712	1.47
22	347004	75	137	8	14	5.99	4883542	0.11
24	70336	8548	71	4	16	1.36	1281399	0.03
25	94486	3	106	6	19	1.63	1807666	0.04
27	492	24	34	9	19	0.01	9865	0.00
28	240331	81258	116	5	26	5.55	8378817	0.20
30	26648	10	112	8	10	0.46	268386	0.01
32	29726	15	36	8	16	0.51	475878	0.01
33	40112	3841	202	8	21	0.76	927184	0.02
34	121303	7065	180	5	17	2.21	2269513	0.05
35	2106151	25332	58	4	19	36.77	40505365	0.95
36	1	-	22	22	22	0.00	22	0.00
37	278028	9452	416	5	67	4.96	19283946	0.45
38	17	-	11	6	6	0.00	115	0.00
40	4965160	-	428	5	20	85.66	100993130	2.36
41	317813	19	77	5	11	5.48	3608093	0.08
42	2416498	7	35	6	9	41.69	23668641	0.55
43	2122108	1	92	5	12	36.61	25800039	0.60
44	634	-	45	6	11	0.01	7498	0.00
45	34384	-	93	6	11	0.59	389463	0.01
46	9	-	17	8	11	0.00	99	0.00
47	10945	-	78	6	12	0.19	136407	0.00
48	34983	9524	146	6	13	0.77	598792	0.01
50	5323306	57312	561	4	20	92.83	110882548	2.59
51	33847	6124	2167	7	49	0.69	1981550	0.05
52	169647	43042	138	5	12	3.67	2725399	0.06
55	69479	19086	177	6	13	1.53	1177962	0.03
60	131800	6885	63	5	18	2.39	2595864	0.06
61	2	-	20	15	17	0.00	35	0.00
66	647	-	10	6	6	0.01	3886	0.00
69	11	2	13	11	12	0.00	157	0.00
70	32009	15	53	5	16	0.55	515885	0.01
71	5	-	46	36	38	0.00	193	0.00
72	49507	12966	48	6	9	1.08	602806	0.01
73	22	-	35	5	15	0.00	344	0.00
74	47476	33992	72	5	15	1.41	1227450	0.03
80	354	8	39	5	11	0.01	4254	0.00
82	3692316	2274	82	4	15	63.74	57485037	1.34
84	2381	244	60	9	14	0.05	37976	0.00
86	176427	6118	291	5	20	3.15	3798018	0.09
88	16645	1739	162	6	50	0.32	929780	0.02
90	2442	8	46	5	20	0.04	49271	0.00
92	346	-	35	10	18	0.01	6286	0.00
96	120	-	39	5	21	0.00	2540	0.00
97	14	-	34	14	22	0.00	321	0.00
99	48504	15	215	8	20	0.84	1013666	0.02
100	3406754	-	134	4	26	58.77	91630270	2.14
110	679093	-	383	8	50	11.72	34503553	0.81
111	93457	-	317	9	83	1.61	7773218	0.18
130	188917	4	315	7	43	3.26	8130815	0.19
210	200906	564	185	5	28	3.48	5697336	0.13
212	270	8	168	13	63	0.00	17531	0.00
222	299964	34	385	5	39	5.18	11740740	0.27
240	213295	-	353	5	36	3.68	7825138	0.18
241	1	-	119	119	119	0.00	119	0.00
242	159	-	133	14	49	0.00	7803	0.00
243	19	-	120	14	43	0.00	821	0.00
245	5796482	1	2111	5	90	100.00	524334174	12.27
246	587384	235230	798	5	40	14.19	33635685	0.79
247	2080	1030	221	8	56	0.05	174215	0.00
250	767016	2	595	4	16	13.23	12453108	0.29
254	5948	-	124	9	16	0.10	99670	0.00
255	121378	7062	292	4	39	2.22	5084878	0.12
256	4940	-	67	8	25	0.09	124809	0.00
257	14592	-	95	6	9	0.25	135714	0.00
258	1	-	11	11	11	0.00	11	0.00
260	5762458	9	684	5	52	99.41	304388833	7.12
261	32965	-	333	16	63	0.57	2080753	0.05
262	30	-	80	17	36	0.00	1089	0.00
263	98259	-	62	5	8	1.70	786240	0.02
265	111846	5	292	5	66	1.93	7417696	0.17
270	126	9	213	16	96	0.00	13026	0.00
300	5729084	15560	639	5	31	99.11	180682898	4.23
302	5	-	6	5	5	0.00	29	0.00
305	7	-	64	32	49	0.00	346	0.00
306	47944	-	394	8	16	0.83	773344	0.02
307	2	-	30	27	28	0.00	57	0.00
310	610607	-	198	5	14	10.53	8636794	0.20
315	113	-	65	10	13	0.00	1575	0.00
321	47407	14179	244	9	31	1.06	1963512	0.05
342	12	14	149	7	41	0.00	1085	0.00
343	4	-	59	28	46	0.00	186	0.00
350	210790	6	227	5	10	3.64	2108393	0.05
351	379	3	1763	21	155	0.01	59291	0.00
352	39	1	103	11	18	0.00	730	0.00
355	5	14	13	5	8	0.00	155	0.00
360	1	-	9	9	9	0.00	9	0.00
362	576788	58792	665	5	30	10.96	19296495	0.45
400	818	-	109	17	42	0.01	34412	0.00
410	20949	105	258	10	64	0.36	1358360	0.03
411	140	-	159	27	57	0.00	8027	0.00
440	642548	14108	240	4	40	11.33	26362189	0.62
490	714694	24833	434	4	43	12.76	32152498	0.75
491	2	-	32	32	32	0.00	64	0.00
500	3091100	1883524	3785	4	49	85.82	245914751	5.75
501	12042	50	2694	9	87	0.21	1056943	0.02
502	31393	56	454	9	48	0.54	1528393	0.04
503	36	-	174	26	89	0.00	3206	0.00
504	2017016	12756	1094	6	43	35.02	88165827	2.06
505	435332	5782	7066	5	311	7.61	137221238	3.21
506	9035	6	423	15	51	0.16	464708	0.01
507	42056	-	146	12	26	0.73	1135499	0.03
508	42984	27	1036	8	67	0.74	2906803	0.07
510	46503	6506	345	6	35	0.91	1878913	0.04
511	216293	1810	1767	5	63	3.76	13841977	0.32
513	764	1	155	9	27	0.01	20836	0.00
514	4	-	41	28	33	0.00	134	0.00
515	113086	14264	1079	11	56	2.20	7219484	0.17
516	5960	58	339	7	32	0.10	194195	0.00
518	70823	39	1033	12	66	1.22	4695854	0.11
520	373488	724	9988	5	173	6.46	64835166	1.52
521	21145	1057	555	5	33	0.38	733768	0.02
522	79	-	289	9	53	0.00	4264	0.00
523	3	-	67	42	53	0.00	161	0.00
524	296	-	295	36	87	0.01	25933	0.00
525	17376	375	715	14	54	0.31	965218	0.02
526	30	-	58	55	56	0.00	1689	0.00
527	2	-	56	29	42	0.00	85	0.00
530	139119	6105	988	8	69	2.51	10145242	0.24
533	93604	4295	1452	13	145	1.69	14292979	0.33
534	7678	25	931	18	103	0.13	794641	0.02
535	6	-	136	49	95	0.00	574	0.00
536	1679	33	488	9	101	0.03	173856	0.00
538	67450	12050	1490	8	89	1.37	7120899	0.17
540	35545	78	1280	4	91	0.61	3245439	0.08
541	28863	6900	322	7	76	0.62	2719048	0.06
544	50	4	391	66	127	0.00	6878	0.00
545	414	13	1797	16	283	0.01	121096	0.00
546	72290	154	676	9	40	1.25	2948203	0.07
547	173	1	666	31	118	0.00	20684	0.00
550	75790	2948	1226	7	110	1.36	8727733	0.20
552	6	-	779	19	309	0.00	1858	0.00
555	11979	287	878	9	85	0.21	1045643	0.02
556	681	4	451	17	67	0.01	46204	0.00
561	4275	13	456	25	71	0.07	306711	0.01
562	1	-	36	36	36	0.00	36	0.00
565	4	-	28	19	24	0.00	97	0.00
567	4	2	270	81	160	0.00	963	0.00
570	81	-	331	23	57	0.00	4654	0.00
580	103108	12125	1163	8	103	1.99	11916602	0.28
581	3247	83	316	24	155	0.06	516552	0.01
583	1257	6	276	12	43	0.02	55221	0.00
585	1003	35	279	11	81	0.02	84294	0.00
586	531	32	237	18	43	0.01	24353	0.00
600	524538	157883	324	7	39	11.77	27161570	0.64
610	397411	66859	422	8	49	8.01	22981786	0.54
611	9494	873	260	12	53	0.18	556610	0.01
630	81302	15199	240	7	35	1.66	3434391	0.08
648	2	-	9	8	8	0.00	17	0.00
650	4346086	4700222	305	4	35	156.07	323615954	7.57
651	1087856	589243	276	6	39	28.93	66088620	1.55
652	3	-	58	29	48	0.00	144	0.00
653	9739	1461	1067	6	29	0.19	327676	0.01
654	15	39	100	18	54	0.00	2956	0.00
655	244233	125000	91	8	32	6.37	12072857	0.28
656	3	-	38	31	34	0.00	103	0.00
657	27	-	58	18	22	0.00	616	0.00
690	11800	5375	139	8	45	0.30	787085	0.02
691	2843	211	116	12	53	0.05	164058	0.00
692	2	-	37	28	32	0.00	65	0.00
693	1200	49	145	10	65	0.02	82221	0.00
694	10	-	161	53	66	0.00	663	0.00
695	20	-	65	36	37	0.00	751	0.00
699	1	1	11	9	10	0.00	20	0.00
700	1627921	768812	513	4	29	41.35	70564585	1.65
710	1286938	371515	374	4	47	28.61	78773470	1.84
711	30853	1273	290	9	83	0.55	2692364	0.06
720	5	-	79	20	46	0.00	232	0.00
730	72313	6248	359	6	34	1.36	2720777	0.06
740	309859	168854	386	5	33	8.26	16177483	0.38
752	158194	17917	117	6	46	3.04	8117349	0.19
753	2721	916	93	6	19	0.06	71170	0.00
755	17	3	49	22	36	0.00	736	0.00
760	9606	736	183	5	46	0.18	484819	0.01
762	122	61	305	13	78	0.00	14379	0.00
765	1208	44	317	8	70	0.02	87883	0.00
767	138	47	396	14	83	0.00	15507	0.00
770	5572	1950	417	7	79	0.13	595219	0.01
772	8342	879	484	7	75	0.16	698453	0.02
773	13151	99	268	13	91	0.23	1211569	0.03
774	18	4	347	15	126	0.00	2776	0.00
775	35311	14406	483	7	71	0.86	3562620	0.08
776	81322	4989	664	7	73	1.49	6305263	0.15
777	2773	583	295	9	69	0.06	233435	0.01
780	256899	25697	894	6	80	4.88	22717151	0.53
785	228946	38139	895	5	78	4.61	20928048	0.49
787	23386	6511	1011	8	84	0.52	2524359	0.06
800	45469	293	162	6	51	0.79	2378695	0.06
810	90701	1840	326	18	81	1.60	7544602	0.18
811	968	8	275	25	118	0.02	115531	0.00
830	342060	14776	434	5	56	6.16	20084803	0.47
840	2886	31	187	14	44	0.05	129600	0.00
850	407051	633	713	5	20	7.03	8252216	0.19
852	80810	62	139	6	58	1.40	4751650	0.11
853	35896	7379	180	8	29	0.75	1272141	0.03
854	4	-	45	28	37	0.00	151	0.00
856	533557	265312	519	5	84	13.78	67260474	1.57
863	35882	7401	285	10	28	0.75	1231389	0.03
864	3	-	32	19	24	0.00	72	0.00
871	223	11	108	32	67	0.00	15704	0.00
880	592	1431	365	24	65	0.03	132397	0.00
886	44	28	187	24	79	0.00	5695	0.00
906	3054	-	47	47	47	0.05	143538	0.00
987	3973	-	157	4	32	0.07	130097	0.00
999	2260	-	7	7	7	0.04	15820	0.00

To learn more about ITS.MARC, please contact TLC at 1.800.325.7759 or email us at info@tlcdelivers.com.

Database Profiles