Table: laserjet_4000_specs_2
Columns: model
introduction
discontinued
cpu_speed
print_speed_ppm
standard_memory
maximum_memory

Question: Which model has a CPU speed of 133mhz?
SQL: SELECT "model" FROM laserjet_4000_specs_2 WHERE "cpu_speed" = '133mhz'

Question: Which model has a maximum memory of 512 mb?
SQL: SELECT MAX("model") FROM laserjet_4000_specs_2 WHERE "maximum_memory" = '512 mb'

Question: What is the maximum memory of the model that has a standard memory of 16 mb?
SQL: SELECT "maximum_memory" FROM laserjet_4000_specs_2 WHERE "standard_memory" = '16 mb'