The MISTA conference series has been allocated an ISSN number (ISSN 2305-249X). As is usual with ISSN registered publications, this number refers to a series of publications, not just a single volume (compare with ISBN). Therefore, the ISSN refers to all the proceedings since the conference started in 2003 (the 2003 proceedings also have an ISBN number).
The key title associated with our ISSN is Proceedings of the Multidisciplinary International Conference on Scheduling: Theory and Applications
To quote from the ISSN web site:
The ISSN (International Standard Serial Number) is an eight-digit number which identifies periodical publications as such, including electronic serials.
The ISSN is a numeric code which is used as an identifier: it has no signification in itself and does not contain in itself any information referring to the origin or contents of the publication.
The ISSN takes the form of the acronym ISSN followed by two groups of four digits, separated by a hyphen. The eighth character is a control digit calculated according to a modulo 11 algorithm on the basis of the 7 preceding digits; this eighth control character may be an "X" if the result of the computing is equal to "10", in order to avoid any ambiguity.
The ISSN is linked to a standardized form of the title of the identified serial, known as the "key title", which repeats the title of the publication, qualifying it with additional elements in order to distinguish it from other publications having identical titles.
If you are interested in finding out more about ISSNs, we would refer you to the issn.org home page.
You might also want to take a look at our ISBN page.