Oki Electric’s if PEN 30 did away with the conventional keyboard found on nearly all computers and instead relied on a wireless pen for all inputs. The resulting user-friendly interface and superior portability allowed the if PEN 30 to be used in many more situations than ordinary computers.

All if PEN 30 operations and controls were made with pen gestures on the display screen. Entering Japanese text was made more efficient by including handwriting recognition software in addition to a conventional kana-kanji conversion function.

The if PEN 433 was announced in May 1994 with an upgraded 33 MHz i486 SX CPU.

Specifications of the if PEN 30
CPU i386 SL 3.3-volt version (20 MHz)
Memory RAM 4 MB standard (expandable up to 8 MB)
File storage HDD One 40 MB, 2.5-inch (half-height) drive
FDD External 3.5/5.35-inch drive connected via a connector box
Flash memory Card-slot mountable (optional)
Monitor Display method Monochrome LCD with backlight
Resolution 640×480
Display control VGA (able to display simultaneously with an external CRT)
Input method Wireless electromagnetic-induction pen and tablet
Card slot Standard equipped with one slot (PCMCIA/JEIDA-compatible)
Expansion bus Connector box interface Connector box interface for peripheral connections
ISA bus interface Interface for ISA board connections
Communication and network functions V.22 bis modem, fax/data modem, 10Base-T LAN card slot supported as an option
Battery operation Continuous operation: ~2 hours, Intermittent operation: ~4 hours
External dimensions [mm]/ weight 297 × 224 x 35 (w x d x h) / ~2 kg

if PEN 433