タブ停てい止し位い置ち

Meanings

1

tab stop

Computing term for a horizontal position where the cursor stops when the Tab key is pressed.

タブ
Refers to the tab key or tab character; タブ停止位置 is the specific stop position.
インデント
Indentation; often achieved using tab stops, but not the same as the stop position itself.

Compound of タブ (tab) + 停止 (stop) + 位置 (position), a direct calque from English 'tab stop'.