Which memory technology was introduced first?

Dynamic Random Access Memory (DRAM) was introduced first among the given choices. DRAM is a type of memory that stores each bit of data in a separate capacitor within an integrated circuit, which allows for efficient storage and rapid access to information. It became widely utilized in computing systems during the late 1970s and early 1980s.

The other types of memory listed—SDRAM, DDR2, and DDR4—are all advancements or variations of this original DRAM technology. SDRAM (Synchronous DRAM) was designed to synchronize with the system bus clock, improving performance over traditional DRAM. DDR2 (Double Data Rate 2 SDRAM) and DDR4 further enhanced data transfer rates and efficiency, but they were developed later as technology progressed. Understanding this timeline highlights the evolution of memory technologies, showcasing DRAM as the foundational technology that paved the way for subsequent advancements.