The 5250 terminal, a product from IBM, was the primary interface to the IBM AS400. The terminal was a non-graphical (text only) monochrome (black screen with green letters, aka Green Screen) display.

Today, the 5250 is emulated in most Terminal Emulation (TE) software packages along with VT and 3270.

Devices with 5GHz radios operate primarily in the range extending from 5.15GHz to 5.35GHz and 5.725GHz to 5.825GHz.

The effective range of 5GHz radios varies dramatically from about 35 feet to about 1800 feet outdoors. No RF site license is required.

The data rate also ranges dramatically from 6Mbps to 54mbps. The 802.11a standard specifies a 5GHz radio.

5GHz is much faster than UHF and 900MHz but has an area of coverage about equal to or smaller than 2.4GHz. It is also less susceptible to RF interference than 2.4GHz.