1. Personification: the poet personifies the computer to a human being and says it had swallowed/ consumed Grandma.
Line 1 : The computer swallowed grandma.
Line 5 : It devoured her completely.
2. Hyperbole is extravagant exaggeration of an incident. Here the poet exaggerates and says the computer had swallowed and consumed grandma.
Line 1 : The computer swallowed grandma.
Line 5 : It devoured her completely.
3. Pun : It’s a play of words. In the poem the poet writes that her grandma was caught by a virus. Virus means medically a bacteria that causes disease. But in computer it denotes to a defect which erases and destroys the data in it.