Elliot Handler daughter, Barbara, who was the namesake of Barbie dolls; and a son, Kenneth (who died of a brain tumor in 1994) who was the namesake of Ken dolls. While a struggling art student and designer of light fixtures, Handler partnered with Harold Matson to design a realistic-looking miniature piano that received roughly 300,000 orders; however, they mispriced the product and lost a dime on each one produced. Mattel received its name from business partners Harold Matt Matson and Elliot Handler in 1945. Elliot's wife, Ruth, took Matson's role when the Handlers bought his share in the late 1940's. Ruth Handler
Interrupt handler interrupts are often provided, which exacerbates stack usage. A primary constraint on the interrupt handler in this programming endeavour is to not exceed the available stack in the worst-case condition, requiring the programmer to reason globally about the stack space requirement of every implemented interrupt handler and application task. When allocated stack space is exceeded (a condition known as a stack overflow), this is not normally detected in hardware by chips of this class. If the stack is exceeded into another writable memory area, the handler will typically work as expected, but the application will fail later (sometimes much later)