Hah. Yes, it's the same word. Or same word-root anyway. Interestingly, a "table" as in a matrix, is called a "pinakas" (πίνακας). Which translates as "board" to English (as in whiteboard, cheeseboard etc).

Have you ever visited Greece? It would be a strange experience, being able to read all the signs but not knowing what they mean. I know because I was in Bulgaria for a conference this summer and I could read everything... but understand not a word :)

That's because it's all in a Cyrillic alphabet which is very similar to the Greek alphabet (it's partly derived from it). Come to think of it, so is the Latin alphabet, but I'm used to seeing Latin signs everywhere, including in Greece.