How is individual locations in EPROM erased?

Individual locations in EPROM (Erasable Programmable Read-Only Memory) cannot be erased selectively; the entire chip must be erased simultaneously. This is typically achieved by exposing the EPROM to ultraviolet (UV) light, which clears the stored data by disrupting the charge in the memory cells. Once erased, the EPROM can be reprogrammed with new data. For selective erasure, other types of memory, like EEPROM or flash memory, are used.