Hi, all:

I've just updated my still fledgling (time, time!) calculator-related site, which you can access using

this link, to include a couple of my HP-related articles featured in past Datafile issues, and now made publicly available online on my site.

All of them do include a program, full documentation and examples, and as of now you can find the following articles there:

**HP-11C: Long Live the HP-11C !**5-page article, includes an 84-step program which will quickly and accurately find the limit sum of any user-defined

infinite alternating series, no matter how slowly it does converge (if at all).**HP-12C: Long Live the HP-12C !**6-page article, includes a 72-step program which will play a challenging game of Bridge-It! against the user.

**HP-12C: Tried & Tricky Trigonometrics**10-page article, includes a 99-step program which evaluates all six trigonometric functions (sin, cos, tan and their

inverses) very quickly and with full accuracy over an extended range of arguments.**Time Voyager**An HP-related short story, in memoriam of Sir Isaac Newton.

**HP-12C: Serendipitous Solver**8-page article, includes a 37-step program which makes use of the built-in machine code solver and a number of

financial functions to find a real root of polynomials up to 14th-degree (up to 1480th-degree or more if there are

groups of repeated coefficients). The program can also evaluate the polynomial for given arguments. Both root

finding and evaluation are implemented using built-in financial functions. without user-code loops or branching.**HP-15C: Long Live the HP-15C !**6-page article, includes a 64-step program which will compute and store the value of Euler's constant e

(=2.71828+) up to 208 decimal digits, using matrix operations.**HP-15C: Nth-degree Polynomial Fitting**7-page article, includes a 42-step program which will compute explicitly the coefficients of a polynomial of degree

N (for 2 <= N <= 6), which exactly fits (passes through) a given set of data points (x,y).**HP-41C: Long Live the Advantage ROM !**8-page article, includes the 62-step HP-41C/Advantage ROM version of the HP-15C program featured in "HP-15C: Nth-degree Polynomial Fitting", extended to handle degrees much higher than 6.

**HP-71B: Modest Mater**12-page article, includes a relatively short BASIC program for the HP-71B that, given a typical 'Mate-in-N-moves'

problem chess position, will recursively search for the solution. Full explanation of its inner workings is provided, as

well as two complete, amazing examples.**HP-42S: Long Live the HP-42S !**14-page article, includes a long and "professional-looking" program to solve the classic '8-Queen Puzzle',

incorporating a number of important techniques such as menus, error control, alphanumeric and graphic outputs,

user ergonomy, and other advanced techniques, all from a didactic viewpoint. Full explanation of its inner workings

is provided, as well as a complete run including all 92 solutions and the filtered subset of the 12 primary ones.**HP-71B: Math ROM Baker's Dozen (Vol. 1)**10-page article, first part of a two-part article featuring 13 assorted mini-topics discussing novel, unusual, or

otherwise interesting aspects of using the extremely powerful and versatile Math plug-in ROM for the HP-71B.

Hope they make interesting reading. I'll keep updating my site with new articles in the near future, as time permits.

Best regards from V.