There seems to be much confusion about the cataloguing of series.
As of June 2006, the Library of Congress no longer authorizes series statements.
However, most cataloguing agencies (including mine) continue to use/create them.
The 440 tag was made obsolete in December 2008.
The series statement as it appears on the item is entered in a 490 tag.
The authorized form of the series statement is entered in a 8xx tag.
Never use a 490 tag without also using a corresponding 8xx tag.
There is no provision for nonfiling characters in the 490 tag’s indicators. Therefore it is prudent to NOT ENTER initial articles in the series statements. If initial articles are entered the series will not index correctly.
When in the past you would have entered a 440 tag, you will now use 490 and 830 tags.
The 830 tag is most often used in direct conjunction with and never without the 490 tag with a first indicator of 1.
The 830 tag will include the Library of Congress authorized title of the series and may also include the number assigned to the particular item.
830 tags must always be justified by a 490 tag.
830 tags are used for series that are produced by more than one author or a corporate body.
800 series tags are used in direct conjunction with and never without the 490 tag with a first indicator of 1.
The 800 tag is used when a series statement is entered under the author’s name. (one author is responsibe for the entire series)
The 800 tag will also include the Library of Congress authorized title of the series and may include the number assigned to the particular item.
I hope this post clarifies the subject. The changes in series cataloguing that have come about in recent years have made many of us confused. Our databases reflect both the old and the new input practices. I guess we all have a lot of recon ahead of us.