Úsáidtear litreacha aibítir na Gréige mar shiombailí matamaitice agus eolaíochta.
| Litir chás uachtair | Litir Cás Íochtarach | Ainm Litreach na Gréige | Coibhéis Béarla | Ainm Litreach Pronounce | 
|---|---|---|---|---|
| Α | α | Alfa | a | volume_up | 
| Β | β | Béite | b | volume_up | 
| Γ | γ | Gáma | g | volume_up | 
| Δ | δ | Delta | d | volume_up | 
| Ε | ε | Epsilon | e | volume_up | 
| Ζ | ζ | Zeta | z | volume_up | 
| Η | η | Eta | h | volume_up | 
| Θ | θ | Theta | th | volume_up | 
| Ι | ι | Iota | i | volume_up | 
| Κ | κ | Kappa | k | volume_up | 
| Λ | λ | Lambda | l | volume_up | 
| Μ | μ | Mu | m | volume_up | 
| Ν | ν | Nu | n | volume_up | 
| Ξ | ξ | Xí | x | volume_up | 
| Ο | ο | Omicron | o | volume_up | 
| Π | π | Pi | p | volume_up | 
| Ρ | ρ | Rho | r | volume_up | 
| Σ | σ, ς * | Sigma | s | volume_up | 
| Τ | τ | Tau | t | volume_up | 
| Υ | υ | Upsilon | u | volume_up | 
| Φ | φ | Phi | ph | volume_up | 
| Χ | χ | Chi | ch | volume_up | 
| Ψ | ψ | Psi | ps | volume_up | 
| Ω | ω | Omega | o | volume_up | 
* úsáidtear an dara litir sigma cás íochtair sa suíomh deiridh focal
| Hieroglyphs na hÉigipte (3500 RC) | 
|  | 
| Aibítir Proto-Sinaitic (1800 RC) | 
|  | 
| Aibítir Phoenician (1200 RC) | 
|  | 
| Aibítir na Gréige (800 RC) |