There was a great thread from DJD started in July which touched on Gutters,Selvedges and Tabs. Other threads about Selvedges by Carol Owens and Devlin since then have made this one of the most popular topics of 2009.
Tina,
Not a dumb question at all. All questions are valid and accepted. We are all here to learn and the only way is to ask questions. But what a wonderful question !

First, philatelic terminology varies from place to place. Even spellings vary, just look at the differences in spelling by the English and the Americans !
Balf showed a scan of a Booklet pane from Oz. According to Balf, or maybe even all Aussies, the left 'stamp' on the top row is a Tab, but to me it is an Advertising label. Booklets from GB have similar such labels. Just one example of Variable terminology.
So what is a Tab?
Laswabbie showed a scan of an Israeli issue with Tabs, but to me they were Short Tabs, [or part tabs]. [Terminology].
I can show you this way;
Laswabbies scan...

My scan of the same 1959 issue with Full tabs......

You can see the difference, and the difference is the Selvedge [or selvage...2 different spellings, same meaning !].
Stamps without Selvedge = Short or part Tabs
Stamps with Selvedge = Full Tabs.
Of course for other countries this may not apply, I am talking about Israel stamps for this discussion.
Now this does not apply to all Israel Stamps. Only the older ones have selvedge. Most stamps after the Mid-Sixties do not have selvedge, only the Tab [Straight edge at bottom [or side]]. So the term 'with full Tabs' only applies to earlier Israel Stamps.
I can add something that may be of importance for those interested in the Stamps of Israel or have some in their collections/stock.
Those stamps [like laswabbie's scan] without selvedge, have a value about the same as a stamp without Tab. For lower values this is not a big difference but for high values it can mean a difference of many $$$$$$ ! So anyone buying/exchanging/selling Israel Stamps would be wise to check if the stamps have full or short [part] tabs.
Even where value is not an issue, Israel stamps should be collected with Full Tabs or you may forever feel there is something missing !

Phew !
Nuff from me.
If you have any more questions,please don't hesitate to ask.
Londonbus1.
PS. If you look in an Oxford dictionary, you will find that the words Selvedge [or selvage] and Tab are both connected to cloth !
