David Hartley

Pacio CEO

Saint Lucia, The Caribbean

The Adventure in Progress

The adventure has encompassed civil engineering, software for the Accounting Profession, and now distributed ledger technology which can scale to meet the world’s business and personal needs, while experiencing life in nine countries along the way.

After starting professional life as a civil engineer in Australia with the Brisbane City Council in 1966, my serious computing started in Namibia, Africa, in 1969 with the mathematical modelling of a large river basin using 100 years of rainfall data.

Back in Australia after a period working with a consulting civil engineering firm, I decided that the computing was more interesting than the engineering, and so started Hartley Computer in 1974, to develop software for the Accounting Profession. My colleagues and I developed HAPAS (HArtley Professional Accountants’ System and SHEILA (System by Hartley for Entirely Integrated Ledger Accounting), plus associated systems, ultimately including hardware (the 3900) and operating system too - RT86, a true pre-emptive multi user multi tasking operating system for the 8086 chip, launched in 1980, 15 years before Windows PCs had that capability.

Hartley Computer was one of the first mini/PC computer vertical market successes in the world, with ultimately 250 staff and 3,000 sites in 7 countries. In the process I became known as “the father of computer client accounting”.

Then from 1985 there was Banksia Information Technology (BIT) in Hong Kong which designed and manufactured IT gear (PCs, modems, and the a voice activated fax/phone switch we called PHAXswitch)...

And so to the UK in 1993 via New Zealand, with HAPAS Mark II, named Hartley.Accountant. By 1998, my partners and I in Hartley Computer UK had gained 1,000 Accounting Practice Clients ranging from sole practitioners to PricewaterhouseCoopers.

But in 1999, my wife Caramia was diagnosed with Primary Progressive Multiple Sclerosis (PPMS). My partners and I sold Hartley Computer to Sage PLC, so that Caramia and I could move to sunnier Antigua in the Caribbean, which Caramia thought would help her by boosting Vitamin D production, as it did. Caramia beat the MS with the help of sun and D but died from cancer in 2015 because of her addiction to sugar.

The adventure in Antigua covered various online projects including researching and prototyping ideas for post XBRL financial data storage and reporting (Standardised Semantic Information Model), and blockchain study - back to school at 72!

In 2017 I moved to Saint Lucia, still in the Caribbean which I had grown to love, to pursue the new Pacio venture described below.

A necessary part of the plans is staying fit and healthy for a long time, involving eating well (much less sugar and carbs, more good fats), intermittent fasting, exercising, sun for Vitamin D, taking my supplements (no meds, NO doctors), and taking advantage of the extreme life extension options becoming available thanks to the fantastic longevity advances in progress, in order to be able to stay the course in a fit and healthy state.


Pacio is a Saint Lucia startup with Keith Cleland and Trevor Watters joining me as founders. Pacio can perhaps best be described by its Vision statement from the Pacio whitepaper:

The Pacio Vision

Trade and industrialisation enabled by continuous advances in science and engineering, and the invention of double entry accounting (DEA) in the 15th Century to keep the records, generated the wealth which created the modern world.

The centuries of progress have culminated in the internet age which has transformed our lives, but at great indirect cost: the control and use of our data by a few with high risk of misuse and theft. Also, the internet has not delivered the productivity and wealth increases of previous ages such as the industrial revolution, in part because record keeping has not advanced commensurately.

Distributed ledger technology (DLT), or blockchain technology, can potentially improve the situation by providing more control over our data and money, but the technology has not yet achieved widescale adoption, largely because of scalability problems and cost.

The Pacio vision is to fix the shortcomings and enable generation of world changing wealth by:

  • Making distributed ledger technology viable by creating the Tender open economy for the benefit of all. Tender will scale to meet the world’s business and personal data and transaction needs at zero fees, thereby enabling microtransactions along with all other transaction types, while complying with all required regulations because it is designed from the start to do so.

    Tender will provide scale and new opportunities - safely. Because of its scalability at low cost it can become the world’s major app platform, used on virtually every phone and computer.

  • Leading the world into the next advance in record keeping – triple entry accounting (TEA) – built on Tender to enable the internet’s potential productivity improvements and wealth to be realised, with IDEA (Immutable Double Entry Accounting) as an interim step to ease the transition. TEA has been described as the Most Important Invention in the Last 500 Years yet it is not in use because the means to do so was not available before Tender.

  • Enabling the world’s productivity – the way to wealth – to be increased dramatically by integrating TARI® technology with TEA and IDEA, then making it accessible to businesses of all sizes so that the internet era wealth increase can exceed that of the industrial revolution.

  • Building the Pacio Integrated Business Suite starting with TEA, IDEA, and TARI® to provide tools and services for app developers, businesses, and individuals to make it all happen.

In these ways Pacio will help enable the true potential of the internet to be realised and deliver world improving wealth.