Tolong jelaskan mengenai Perdana Menteri Islandia dari Daftar Perdana Menteri Islandia

CiP: Citizens' Party (Borgaraflokkurinn). Extinct.

CP: Conservative Party (Íhaldsflokkurinn). Extinct.

HP: Home Rule Party (Heimastjórnarflokkurinn). Extinct.

LL: Association of Liberals and Leftists (Samtök frjálslyndra og vinstri manna). Extinct.

OIP: The old Independence Party (no relation to the current one). OIP langsum and OIP þversum denote two fractions that split the party at one time. Extinct.

PA: The People's Alliance (Alþýðubandalagið). Extinct.

PP: The Progressive Party (Framsóknarflokkurinn).

SD: Social Democrats (Alþýðuflokkurinn). Extinct.