Sord IS-11

The Sord IS-11 was a battery-powered portable computer with built-in word-processing, spreadsheet, file-management and communications software. Instead of floppy disks, the original model used non-volatile memory and a microcassette drive built into its compact clamshell case.

Its eight-line LCD and light weight suited field work rather than conventional desktop software. Later IS-11B and IS-11C revisions expanded memory and display capabilities while preserving the appliance-like approach.

Notable Features

• Built-in productivity applications operated without loading a conventional operating system.
• Internal microcassette provided approximately 128KB of inexpensive removable storage.
• CMOS electronics and non-volatile RAM supported portable battery operation.

Historical Significance

• An early Japanese portable productivity computer that anticipated later electronic organisers and laptops.
• Prioritised ready-to-use applications over compatibility with desktop CP/M systems.

Collector’s Notes

• The IS-11B was a later intermediate variant; the substantially redesigned IS-11C is catalogued separately.
• Battery leakage, LCD condition and the unusual microcassette mechanism require careful inspection.

Specifications

Technical Information
Name	Sord IS-11
Manufacturer	Sord Computer Corporation
Launched	Sunday, April 1, 1984
Discontinued	Mid-1980s
Launch Price	US$995
Country	Japan
CPU	CMOS Zilog Z80A-compatible processor at approximately 3.4 MHz
Units Sold
Operating System	Built-in word processor, spreadsheet, file manager and communications software
I/O	RS-232, printer, modem and expansion interfaces
Keyboard	Integrated keyboard
Storage	Built-in 128KB microcassette; non-volatile solid-state storage
Sound	Internal beeper
Graphics	256x64 pixels on the original IS-11
Display	LCD, 40x8 text
ROM	64KB
RAM	32KB to 64KB non-volatile RAM
CPU Speed	Approximately 3.4 MHz