Sometime you need to a have a link to filtered list in Sharepoint. Luckily Sharepoint has the ability to do this. You need to use the following parameters after the list url:
......allitems.aspx?Filtername=<name of field>&FilterMultiValue=<filter text>
<name of the field> is the field name in your list, you wish to filter on (eg. Name etc)
<filter text> is the filter criteria. You can use * as an wildcard. You can add multiple filter text values by separating them with semi colons.
For example:
......allitems.aspx?Filtername=Name&FilterMultiValue=A*;B*
will show all items starting where the Name starts with A or B.
I like this method because it allows you to have multiple values and wildcards. You could also use the FilterField1 and FilterValue1 parameters. (see for more info: Using URL to sort or filter a list).