HP 33s Scientific manual RPN The Automatic Memory Stack, Clearing the X-Register

Periods and Commas in Numbers	1–18
Number of Decimal Places	1–19
SHOWing Full 12–Digit Precision	1–20
Fractions	1–21
Entering Fractions	1–21
Displaying Fractions	1–23
Messages	1–23
Calculator Memory	1–24
Checking Available Memory	1–24
Clearing All of Memory	1–24

2. RPN: The Automatic Memory Stack

What the Stack Is	2–1
The X and Y–Registers are in the Display	2–2
Clearing the X–Register	2–2
Reviewing the Stack	2–3
Exchanging the X– and Y–Registers in the Stack	2–4
Arithmetic – How the Stack Does It	2–4
How ENTER Works	2–5
How CLEAR x Works	2–6
The LAST X Register	2–7
Correcting Mistakes with LAST X	2–8
Reusing Numbers with LAST X	2–9
Chain Calculations in RPN mode	2–11
Work from the Parentheses Out	2–11
Exercises	2–13
Order of Calculation	2–13
More Exercises	2–14

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