When reading this and other fora, there seem to exist two basic approaches for filing reference material: the A-Z filing in alphabetic order and the numerical filing where each item gets a number and the title and search index is stored in some support system (e.g. Excel or specific systems like PaperTiger).
A-Z filing is often used with broad indexes. For instance, I read in http://www.davidco.com/forum/showthread.php?t=4014 examples like having an entry for tax where all tax related stuff goes in, etc. And it was said that you always have to identify the right entry point to find it later again.
On the other hand, numerical filing seems to give each item a specific number and each item is registered in the support system. These seems to mean that you have a finer granularity of your identifies items. On the other hand, things which belong to each other are definitely not stored together because filing is done sequentially in the sequence the items comes in. Some posts expressed concern in this direction.
Does anybody have experiences with both of the filing methods? Has sombody done an explicit choice? What were the arguments for or against the approaches? I'm just starting my filing system and would be happy to learn from your thoughts and experiences. Thank you.