USB to RS232 Converter - 6ft - CAB-11304 - SparkFun Electronics

There are a lot of devices out there that still communicate over RS232 but we bet your new laptop isn

RS232 Shield - Raspberry Pi - DEV-12827 - SparkFun Electronics

MIKROE-2872 Mikroe

Cerberus USB Cable - 1.8m (6ft) with internal hub - Proto-PIC

USB to 4-PORT RS232 CONVERTER

DTech FTDI USB to TTL Serial Converter Charging Adapter Cable 3.3V TX RX Signal 4 Pin 0.1 inches Pitch Female Socket PL2303 Prolific Chip Windows 10 8 7 XP Vista (Black, 3ft)

Cable USB TO RS232 CONVERTER,FTDI

SparkFun USB to Serial GPIO Breakout - CP2103 - BOB-00199 - SparkFun Electronics

SparkFun Transceiver Breakout - MAX3232 - BOB-11189 - SparkFun Electronics

FTDI USB to Serial Adapter Cable w/ COM - Serial Cards & Adapters, Add-on Cards & Peripherals

USB-RS232 Converter (FT231X BoB)

Buy 6 Pin USB to TTL UART Serial Cable Online