Voidrunner Communications and Computing

Arguably the key technologies of not only the modern world, but most science fiction ones as well, communications and computing are all about data: generating, transmitting, interpreting, manipulating, storing, and concealing it as the need arises. 

Data Wafer. Data wafers are miniature storage devices about the size of a fingernail. The standard capacity is 1 petabyte.
Holders in the forms of rings, pendants, and other jewelry are often used to avoid losing them.

Personal Communicator (ICD). Individual communication devices are very common in most societies. A typical device allows its user to communicate by video, audio, or through text, can connect to whatever society-wide network exists, and runs a selection of useful programs. A personal communicator is typically a small device controlled with hand gestures, but it may take the form of a heads-up device that combines a monocle or visor with an earpiece, a wristwatch, or even a badge worn as a pin on the lapel. 

Portable Computing Device (PCD). These devices are designed for scenarios where a larger viewable area and/or a bit more processing power than an ICD is desirable. They may be a folding device with a separate keyboard or other control panel and screen, or they may look like a giant ICD (this latter type is sometimes referred to as a datapad). In some worlds, they may also be worn on the arm, generating a user interface out of projected light that can be interacted with by multiple appendages at once.

Signal Jammer. These devices interfere with the signals generated by wireless networks of various types. Signal jammers are usually found in the possession of militaries and clandestine organizations, but criminals, security services, and hackers employ them as well. The listed cost is for a small version that fits in a backpack or briefcase, but larger ones that require vehicles or even towers to employ also exist. The portable version covers roughly 4 city blocks, making it impossible to get a wireless network signal in or out of the area while it is active. Setting the jammer up takes a minute. Once it is set up, activating or deactivating it takes an action. 

Workstation Computing Device (WCD). Dispensing with portability entirely, these larger-scale computers are used on desktops or ship’s terminals. They have a lot of processing power and are favored by those who need it like engineers, programmers, gamers, hackers, and those responsible for creating media such as video and music.