Old English	Latin	Example
Ampersand (&)	-	et
Tironian nota (7)	and	et
Abbreviations	[  ]	[  ]	q[uo]s
Punctuation	IGNORE	IGNORE
Numerals (with dots)	.NUMERAL.	.NUMERAL.	.iii.
Special Characters	copy & paste	copy & paste	Æ æ Ð ð Þ þ Ȝ ȝ
Anglo-Saxon g (ƽ)	g	g
Wynn (ƿ)	w	-
u	u	u

For a full list of all the marks of abbreviation, suspensions and contractions used in medieval texts see A. Cappelli's Dizionario di Abbreviature Latine ed Italiane (Milano, 1912). You can find its online version here (opens a new window).