All these calculations are done on fast, custom hardware using reprogrammable field-programmable gate arrays (FPGA). Intel processors have reprogrammable microcode since the P6 microarchitecture. C-type missiles were fitted with a reprogrammable microprocessor, allowing for incremental firmware updates. Actel's flash-based FPGA families include these same characteristics and are also reprogrammable and low power. Computers became reprogrammable rather than fixed-purpose devices. By applying write protection, some types of reprogrammable ROMs may temporarily become read-only memory. The anime series "Serial Experiments Lain" also explores the idea of reprogrammable reality and memory. This is comparable to the design of Jeri Ellsworth's C-One reprogrammable computer. Also, servitization can be seen as a consequence of the reprogrammable nature as well. Cumma was a Catalyst company that created a self-serve kiosk and reprogrammable video game cartridges. The AIM-9X concept is to use reprogrammable software to permit upgrades without disassembly. The GI chipset lacked reprogrammable graphics and Mattel worked with GI to implement changes. It has an actual size of 1 megabyte and is reprogrammable. Furthermore, the digital twin is also reprogrammable in an automatic manner.