1. Spiritual afterlife - The belief in the immortal soul is a dogma of Christianity, Hinduism, Islam, and Judaism. This belief is related to the philosophy of dualism.
2. Genetic immortality. This view of immortality concentrates on leaving offspring, or immortality via evolution, which is curiously similar to Richard Dawkins' theory of the selfish gene ("you never really quite die; as long as there is some of your genetic material left behind in this world").
3. Magically immortal - Many European and Chinese alchemists were among such people. The depiction in literature of Gilgamesh was one such as this and an entire cycle, or cycles of Arthurian legend exist in the British Isles, including the Knights of the Round Table going in search for the Holy grail; supposedly, the chalice from which Jesus and his disciples drank at the Last Supper. It may also be taken to mean being invincible or unable to be killed.
4. Never dying - Some believe life extension technologies will lead to rejuvenation. Some believe cryogenics will allow the dead to be revived in a medically advanced future.
5. Atomic immortality - Your mind ceases with death. Your body decomposes. Worms eat your flesh, birds eat the worms, your family eats the birds. Your physical body goes on to be recycled throughout the rest of time. While "you" cease to exist in a living person sense, your body will be recycled until the end of the universe.
6. Quantum immortality - In the many worlds interpretation of quantum mechanics, the wavefunction never collapses, and thus all possible outcomes of a quantum event exist simultaneously, with each event apparently spawning an entirely new universe in which a single possible outcome exists. In this physical theory, one could hypothetically live forever as there might exist a string of possible quantum outcomes in which one never dies. This theory of quantum immortality, however, is not widely regarded by the scientific community as being a verifiable or even necessarily correct offshoot of the many worlds interpretation, which itself exists as one possible interpretation of quantum mechanics among many.
7. Artificial immortality - This represents the concept of transferring one's consciousness from the brain to an alternative media providing the same functionality as the brain. Such a media may be biological or non-biological. The transference may be gradual (e.g. through cognitive prostheses) or immediate (e.g. through a brain scan).