Psion Organiser was the brand name of a range of pocket computers developed by the British company Psion in the 1980s. The Organiser I (launched in 1984) and Organiser II (launched in 1986) had a characteristic hard plastic sliding cover protecting a 6×6 keypad instead of a computer keyboard, with letters arranged alphabetically. The Organiser II competed with the Filofax and can be considered the first usable electronic organizer or personal digital assistant (PDA) in that it combined an electronic diary and searchable address database in a small, portable device. Production of consumer hand-held devices by Psion has now ceased; the company, after corporate changes, now concentrates on hardware and software for industrial and commercial data-collection applications. On an episode of The Gadget Show, first aired 30 March 2009, the Psion was pitted against the BlackBerry for a place on the show's Hall of Fame. Whilst the Psion was highly praised as a device that pioneered portable computing, host Jon Bentley ultimately gave the accolade to the BlackBerry. As of autumn 2017 several software features and hardware devices are still being developed and are available including a JavaScript Emulator, Parallel Interface, USB Commslink, 32 kilobyte (KB) and 256 KB RAMpaks, and 512 KB FlashPak. Organiser I Launched in 1984, the Psion Organiser was the "world's first practical pocket computer". Based on an 8-bit Hitachi 6301-family processor, running at 0.9 MHz, with 4 KB of read-only memory (ROM) and 2 KB of static RAM and has a one-row monochrome liquid crystal display (LCD) screen. The size with the case closed is 142 × 78 × 29.3 mm, and the mass is 225 grams. A Byte reviewer described the Organiser's software as a "clever design ... for fast and foolproof use". He approved of the consistent user interface across applications and reported that without documentation he was able to learn how to do everything except program in 15 minutes. The machine provided a simple flat-file database, calculator and clock, and had no operating system (OS). The Organiser I supported removable storage write once read many (write-once) devices, which used erasable programmable read-only memory EPROM storage. The device can host two of these, named Datapaks (stylized as DATAPAK, or simply PAK), to which it can write data, but which must be removed from the device and erased by exposure to ultraviolet light before they can be re-used. As Psion had patented the use