Name: OEL TTX2000 more
Manufacturer: O.E. Ltd
Price: £125.00
Blurb: Teletext adaptor for the Spectrum. Connects to the Ariel and receives Ceefax and Oracle. Store pages for later viewing. Original versions could not download the software available, but later versions included an updated ROM that added this cabability.
Source: Sinclair User Jan 85
Note: This may be the same unit as the Volex TTX2000S, but the boxes and manufacturers are different. Any further info ?

Name: Omega more
Manufacturer: Quant Systems
Price: No price given, but it excludes vat !
Blurb: Run CP/M on your computer via a standard RS232 port. Box contains Z80a, 64k Ram, 4k Rom, serial and parallel ports. Runs CP/M 2.2.
Source: Your Spectrum issue 11

Name: Omega SCSI/Plus Adaptor more
Manufacturer: Quant Systems
Blurb: Low cost SCSI controller that connects direct to the Omega. 4 Megabits/sec throughput.
Source: Your Spectrum issue 11

Name: Omni-Reader more
Manufacturer: Metroheath Ltd
Price: £39.99
Blurb: Optical character reader for the Spectrum. (amongst others). Flat plastic base with a rod at the right hand side, allows the reader arm to move over the document and the software converts it into text on the screen. The unit computes the letters of the text and transmits it as standard ASCII to the computer.
Source: PCW Nov 86

Name: One Finger Mk.II more
Manufacturer: RAMS (Regis Amateur Micro Society)
Blurb: A one fingered typewriter for disabled people. Originally developed on the ZX81 (Mk.I), the interface and software allowed any disbaled person who could move at least one part of their body, to use a microcomputer. Programs developed for the system include a full featured word processor.
Source: Sinclair User Apr 83

Name: On/Off Switch more
Manufacturer: TEC Publications
Price: £4.95
Blurb: Saves wear & tear.
Source: Your Spectrum issue 17

Name: Opus 3 inch Disk Drive more
Manufacturer: Opus Supplies Ltd
Price: £229.95
Blurb: 400k storage. 3ms access. Direct drive. (needs interface)
Source: Your Spectrum issue 11

Name: Opus 5.25 inch Disk Drive more
Manufacturer: Opus Supplies Ltd
Price: £149.95 (single sided) £189.95 (double sided)
Blurb: 100k (single sided). 200k (double sided) Needs interface.
Source: Your Spectrum issue 11

Name: Opus Discovery more
Manufacturer: Opus Supplies Ltd
Price: £199.95
Blurb: A true disk drive system for your Spectrum. 250k floppy drive and interface. Video output port. Joystick port. Through port. Parallel printer port.
Source: Your Spectrum issue 17
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.
Read the feature

Name: Opus Spectra Disc Interface more
Manufacturer: Opus Supplies Ltd
Price: £99.95
Blurb: DOS on rom. Compabible with all Opus drives. Centronics port.
Source: Your Spectrum issue 11

Name: Orat more
Manufacturer: Add.On.Its
Price: £32.00
Blurb: Speech box add on.
Source: Home Computer Weekly August 83

Name: Orme EPROM Card more
Manufacturer: Orme Electronics
Price: Card £21.25, EPROM £9.95
Blurb: Eprom card giving 10 extra BASIC commands. including re-numbering, editing, character manouvering and variable dumping.
Source: Sinclair User Sep 83

Name: OZ Connector more
Manufacturer: J. Inceldon
Price: £18.00
Blurb: Small box that sits between the cassette and the Speccy. Connecting a small speaker will allow you to hear and monitor the tape loading. You can also speak and intro for your programs via a microphone.
Source: Sinclair User Dec 82