To type directly with the computer keyboard:

• Type = to add a stroke
• Use uppercase E, O, U, I, A for: éa, ói, úi, ío, ae
• Type > and < for the feathers (marks beginning and end of Ogham text)
• Type - or _ for a space mark

fid (plural: feda): character ("tree")
aicme (plural: aicmí): group ("family") of 5 characters
forfeda: additional characters (mainly in manuscripts)