A whiteboard of architecture diagrams with two people at it

Plate 01/The argument

British computing was built as women’s work, then reclassified out of their hands.

Section 01 · the lead entry

The Card Room

How a production floor hid inside a British office

Before the computer there was the punched-card installation: rooms of sorters, collators and tabulators run overwhelmingly by women, organised like a production line and paid like clerical work. The machines were the prestige; the operation was not — and that division survived the arrival of the computer.

Read entry 01.1

Into the 1960s the work of running Britain’s computers was clerical work, and clerical work was women’s work: punching, verifying, operating, and coding from a flow diagram somebody senior had drawn. The machines carried the prestige. The code did not.

What changed was the classification, not the task. As programming was redefined upward into a profession with its own entry requirements, the people already doing it were not carried up with it.

This publication sets out that record, and then the structural present: where the pipeline narrows, why retention is the harder number than recruitment, what returnships are for, and what a published pay gap measures.

Calculator, pen, and printed accounting reports with pie charts and numerical tables on a desk

Filters and figures

What pay-gap reporting measures

The figure and what it actually captures

Entry 07.2

Empty office with mesh-back desk chairs and rows of stacked chairs behind

Retention

Mid-career attrition

Why recruitment cannot solve it

Entry 05.1

Rows of vintage teleprinter machines and chairs face each other on patterned tile flooring

Clerical origins

The marriage bar

The structure of enforced exit

Entry 01.4

An archival-looking tape or card machine with an operator — Plate 02Operating was a grade, not a step. The machine room was staffed by classes of worker whose ceiling was written into the grade itself, and the reclassification of programming as professional work happened above their heads.Photo: Nikita Korchagin / PexelsSection 01 — Clerical origins

Every entry states what a figure actually measures before it says what it shows.

Three figures, and what each one measures

Stated before it is used

c. 75%of personnel at the wartime Bletchley Park site were women, at a peak of roughly 9,000 staff.Measures site personnel in all roles — clerical, operating and intercept work. It is not a count of programmers. Source: Bletchley Park Trust.

1975The Equal Pay Act 1970 came into force — after the decade in which the profession’s hierarchy was set.Measures the date of legal effect, five years after Royal Assent. It does not measure the date pay practice changed. Source: statute.

250+employees is the threshold at which an employer must publish its gender pay gap each year.Measures mean and median hourly and bonus gaps, and pay quartiles, across a whole workforce. It is not a test of equal pay for equal work, and covers no smaller employer. Source: gender pay gap reporting regulations, in effect since 2017.