- Norwegian mathematician (1802-1829)
- (Old Testament) Cain and Abel were the first children of Adam and Eve born after the Fall of Man; Abel was killed by Cain
- Afterwards she had another child, his brother Abel.
- And I hear Abel's main interest is stamp collecting.
- ABEL:Air Breathing Electric Laser 空气呼吸电激
- ABEL:Advanced Boolean Expression Language 先进的布尔表达式的语言
- ABEL:Advanced Boolean Equation Language 先进的布尔方程的语言