From Calculator Logic Toward Memory the Density Argument Finds a Bigger Target

# From Calculator Logic Toward Memory: the Density Argument Finds a Bigger Target

## 1. The Same Argument, a Larger Market

The density and standing-power argument that sold calculator chips scaled naturally toward a much larger target: computer memory, where magnetic-core technology was reliable but expensive, bulky, and hard to shrink further, while a MOS bit-cell array could in principle be shrunk generation after generation the same way calculator logic had been.

By the end of the 1960s, several of the same companies and engineers who had built the first commercial MOS logic parts were turning their attention to memory, recognizing that a calculator chip's few hundred transistors was a much smaller commercial opportunity than a memory chip holding a thousand or more bits on a comparably sized die.

Market Size: Calculator Logic vs. Computer Memory, Late 1960s 9. The Same Argument, a Larger Market ADOPTION CURVE early units volume ramp mainstream the same density advantage that won calculator sockets pointed toward a market an order of magnitude larger

## 2. A Named Handoff, Not a Retelling

The chip generally credited as the first commercially significant MOS dynamic memory part arrived in the early 1970s from the same Intel process lineage introduced in step 7, and it is referenced here only by its era and by name — the Intel 1103-era DRAM context — because the structural engineering story of that specific device, the one-transistor cell and the scaling pressure that followed it, belongs to `dram_1968` and `dramscaling_1974`, two already-drafted series in this directory that are not retold here.

Named Handoff to the Memory Story 9. A Named Handoff, Not a Retelling STRUCTURE this series' own scope calculator-chip mos commercialization, 1964-1968 dram 1968 / dramscaling 1974 intel 1103-era memory engineering, named only the density argument's biggest payoff belongs to a different, already-drafted series

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